51158772432 has 30 divisors (see below), whose sum is σ = 143173509362. Its totient is φ = 17052924096.

The previous prime is 51158772409. The next prime is 51158772439. The reversal of 51158772432 is 23427785115.

51158772432 is a `hidden beast` number, since 5 + 11 + 587 + 7 + 24 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50043479616 + 1115292816 = 223704^2 + 33396^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51158772439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 177634483 + ... + 177634770.

Almost surely, 2^51158772432 is an apocalyptic number.

It is an amenable number.

51158772432 is an abundant number, since it is smaller than the sum of its proper divisors (92014736930).

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

51158772432 is a wasteful number, since it uses less digits than its factorization.

51158772432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355269267 (or 355269258 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 51158772432 in words is "fifty-one billion, one hundred fifty-eight million, seven hundred seventy-two thousand, four hundred thirty-two".