51615164677 has 4 divisors (see below), whose sum is σ = 51811420320. Its totient is φ = 51418909036.

The previous prime is 51615164663. The next prime is 51615164707. The reversal of 51615164677 is 77646151615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51615164677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51615164677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615164617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98127427 + ... + 98127952.

It is an arithmetic number, because the mean of its divisors is an integer number (12952855080).

Almost surely, 2^51615164677 is an apocalyptic number.

It is an amenable number.

51615164677 is a deficient number, since it is larger than the sum of its proper divisors (196255643).

51615164677 is a wasteful number, since it uses less digits than its factorization.

51615164677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196255642.

The product of its digits is 1058400, while the sum is 49.

The spelling of 51615164677 in words is "fifty-one billion, six hundred fifteen million, one hundred sixty-four thousand, six hundred seventy-seven".