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51126139008 = 273372301907
BaseRepresentation
bin101111100111010110…
…101111100010000000
311212222001211221221000
4233213112233202000
51314201242422013
635253110332000
73456645003600
oct574726574200
9155861757830
1051126139008
111a756410a4a
129aaa05a000
134a8a173179
142690114c00
1514e3690973
hexbe75af880

51126139008 has 192 divisors, whose sum is σ = 175529311200. Its totient is φ = 14607419904.

The previous prime is 51126139003. The next prime is 51126139013. The reversal of 51126139008 is 80093162115.

51126139008 is a `hidden beast` number, since 5 + 1 + 1 + 261 + 390 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (51126139003) and next prime (51126139013).

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×511261390082 (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51126139003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18391 + ... + 320297.

Almost surely, 251126139008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51126139008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87764655600).

51126139008 is an abundant number, since it is smaller than the sum of its proper divisors (124403172192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51126139008 is a wasteful number, since it uses less digits than its factorization.

51126139008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301944 (or 301919 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 51126139008 in words is "fifty-one billion, one hundred twenty-six million, one hundred thirty-nine thousand, eight".