51256156532 has 24 divisors (see below), whose sum is σ = 103809941760. Its totient is φ = 21688860960.

The previous prime is 51256156513. The next prime is 51256156541. The reversal of 51256156532 is 23565165215.

It is a self number, because there is not a number n which added to its sum of digits gives 51256156532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11583719 + ... + 11588142.

It is an arithmetic number, because the mean of its divisors is an integer number (4325414240).

Almost surely, 2^51256156532 is an apocalyptic number.

It is an amenable number.

51256156532 is an abundant number, since it is smaller than the sum of its proper divisors (52553785228).

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

51256156532 is a wasteful number, since it uses less digits than its factorization.

51256156532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23171951 (or 23171949 counting only the distinct ones).

The product of its digits is 270000, while the sum is 41.

The spelling of 51256156532 in words is "fifty-one billion, two hundred fifty-six million, one hundred fifty-six thousand, five hundred thirty-two".