51490521927936 has 432 divisors, whose sum is σ = 183801147187840. Its totient is φ = 13579908526080.

The previous prime is 51490521927863. The next prime is 51490521927947. The reversal of 51490521927936 is 63972912509415.

51490521927936 is a `hidden beast` number, since 5 + 1 + 4 + 9 + 0 + 521 + 9 + 2 + 79 + 36 = 666.

It is a super-2 number, since 2×51490521927936² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34706631 + ... + 36159801.

Almost surely, 2^{51490521927936} is an apocalyptic number.

51490521927936 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51490521927936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91900573593920).

51490521927936 is an abundant number, since it is smaller than the sum of its proper divisors (132310625259904).

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

51490521927936 is a wasteful number, since it uses less digits than its factorization.

51490521927936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453239 (or 1453196 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 63.

The spelling of 51490521927936 in words is "fifty-one trillion, four hundred ninety billion, five hundred twenty-one million, nine hundred twenty-seven thousand, nine hundred thirty-six".