51021264056 has 16 divisors (see below), whose sum is σ = 109331280240. Its totient is φ = 21866256000.

The previous prime is 51021264031. The next prime is 51021264083. The reversal of 51021264056 is 65046212015.

51021264056 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 2×51021264056² (a number of 22 digits) contains 22 as substring.

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, 455546945 + ... + 455547056.

It is an arithmetic number, because the mean of its divisors is an integer number (6833205015).

Almost surely, 2^51021264056 is an apocalyptic number.

51021264056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51021264056 is an abundant number, since it is smaller than the sum of its proper divisors (58310016184).

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

51021264056 is a wasteful number, since it uses less digits than its factorization.

51021264056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911094014 (or 911094010 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 51021264056 in words is "fifty-one billion, twenty-one million, two hundred sixty-four thousand, fifty-six".