51658879897856 has 144 divisors (see below), whose sum is σ = 132707270750208. Its totient is φ = 19477583308800.

The previous prime is 51658879897847. The next prime is 51658879897897. The reversal of 51658879897856 is 65879897885615.

51658879897856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51658879897856² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41657990 + ... + 42880133.

Almost surely, 2^{51658879897856} is an apocalyptic number.

51658879897856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51658879897856 is an abundant number, since it is smaller than the sum of its proper divisors (81048390852352).

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

51658879897856 is a wasteful number, since it uses less digits than its factorization.

51658879897856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84538188 (or 84538174 counting only the distinct ones).

The product of its digits is 73156608000, while the sum is 92.

The spelling of 51658879897856 in words is "fifty-one trillion, six hundred fifty-eight billion, eight hundred seventy-nine million, eight hundred ninety-seven thousand, eight hundred fifty-six".