51656732352087 has 4 divisors (see below), whose sum is σ = 68875643136120. Its totient is φ = 34437821568056.

The previous prime is 51656732352007. The next prime is 51656732352163. The reversal of 51656732352087 is 78025323765615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51656732352087 - 2³⁹ = 51106976538199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51656732352087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656732352007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609455392012 + ... + 8609455392017.

It is an arithmetic number, because the mean of its divisors is an integer number (17218910784030).

Almost surely, 2^{51656732352087} is an apocalyptic number.

51656732352087 is a deficient number, since it is larger than the sum of its proper divisors (17218910784033).

51656732352087 is a wasteful number, since it uses less digits than its factorization.

51656732352087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218910784032.

The product of its (nonzero) digits is 63504000, while the sum is 60.

The spelling of 51656732352087 in words is "fifty-one trillion, six hundred fifty-six billion, seven hundred thirty-two million, three hundred fifty-two thousand, eighty-seven".