51550052256 has 36 divisors (see below), whose sum is σ = 146595461922. Its totient is φ = 17183350656.

The previous prime is 51550052201. The next prime is 51550052273. The reversal of 51550052256 is 65225005515.

51550052256 is a `hidden beast` number, since 5 + 1 + 550 + 0 + 52 + 2 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34262010000 + 17288042256 = 185100^2 + 131484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51550052256.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89496331 + ... + 89496906.

Almost surely, 2^51550052256 is an apocalyptic number.

It is an amenable number.

51550052256 is an abundant number, since it is smaller than the sum of its proper divisors (95045409666).

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

51550052256 is a wasteful number, since it uses less digits than its factorization.

51550052256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178993253 (or 178993242 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 51550052256 in words is "fifty-one billion, five hundred fifty million, fifty-two thousand, two hundred fifty-six".