51009145555 has 8 divisors (see below), whose sum is σ = 61501075344. Its totient is φ = 40613916000.

The previous prime is 51009145553. The next prime is 51009145567. The reversal of 51009145555 is 55554190015.

51009145555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51009145555 - 2¹ = 51009145553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51009145553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24173896 + ... + 24176005.

It is an arithmetic number, because the mean of its divisors is an integer number (7687634418).

Almost surely, 2^51009145555 is an apocalyptic number.

51009145555 is a deficient number, since it is larger than the sum of its proper divisors (10491929789).

51009145555 is a wasteful number, since it uses less digits than its factorization.

51009145555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48350117.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 51009145555 in words is "fifty-one billion, nine million, one hundred forty-five thousand, five hundred fifty-five".