51611304416 has 24 divisors (see below), whose sum is σ = 116125435440. Its totient is φ = 22119130368.

The previous prime is 51611304301. The next prime is 51611304431. The reversal of 51611304416 is 61440311615.

It is a super-2 number, since 2×51611304416² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115203581 + ... + 115204028.

It is an arithmetic number, because the mean of its divisors is an integer number (4838559810).

Almost surely, 2^51611304416 is an apocalyptic number.

51611304416 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51611304416 is an abundant number, since it is smaller than the sum of its proper divisors (64514131024).

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

51611304416 is a wasteful number, since it uses less digits than its factorization.

51611304416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230407626 (or 230407618 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 51611304416 in words is "fifty-one billion, six hundred eleven million, three hundred four thousand, four hundred sixteen".