51125577477656 has 64 divisors (see below), whose sum is σ = 106126922926080. Its totient is φ = 22896185748480.

The previous prime is 51125577477641. The next prime is 51125577477673. The reversal of 51125577477656 is 65677477552115.

It is a super-2 number, since 2×51125577477656² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (68) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11525636 + ... + 15332691.

It is an arithmetic number, because the mean of its divisors is an integer number (1658233170720).

Almost surely, 2^{51125577477656} is an apocalyptic number.

It is an amenable number.

51125577477656 is an abundant number, since it is smaller than the sum of its proper divisors (55001345448424).

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

51125577477656 is a wasteful number, since it uses less digits than its factorization.

51125577477656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26858664 (or 26858660 counting only the distinct ones).

The product of its digits is 432180000, while the sum is 68.

The spelling of 51125577477656 in words is "fifty-one trillion, one hundred twenty-five billion, five hundred seventy-seven million, four hundred seventy-seven thousand, six hundred fifty-six".