51656544583151 has 4 divisors (see below), whose sum is σ = 51682726310712. Its totient is φ = 51630362855592.

The previous prime is 51656544583043. The next prime is 51656544583157. The reversal of 51656544583151 is 15138544565615.

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 51656544583151 - 2²² = 51656540388847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656544583157) 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, 13090860821 + ... + 13090864766.

It is an arithmetic number, because the mean of its divisors is an integer number (12920681577678).

Almost surely, 2^{51656544583151} is an apocalyptic number.

51656544583151 is a deficient number, since it is larger than the sum of its proper divisors (26181727561).

51656544583151 is a wasteful number, since it uses less digits than its factorization.

51656544583151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181727560.

The product of its digits is 43200000, while the sum is 59.

The spelling of 51656544583151 in words is "fifty-one trillion, six hundred fifty-six billion, five hundred forty-four million, five hundred eighty-three thousand, one hundred fifty-one".