51931676645 has 8 divisors (see below), whose sum is σ = 62644285440. Its totient is φ = 41327825680.

The previous prime is 51931676593. The next prime is 51931676651. The reversal of 51931676645 is 54667613915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51931676645 - 2⁸ = 51931676389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27188405 + ... + 27190314.

It is an arithmetic number, because the mean of its divisors is an integer number (7830535680).

Almost surely, 2^51931676645 is an apocalyptic number.

It is an amenable number.

51931676645 is a deficient number, since it is larger than the sum of its proper divisors (10712608795).

51931676645 is a wasteful number, since it uses less digits than its factorization.

51931676645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54378915.

The product of its digits is 4082400, while the sum is 53.

The spelling of 51931676645 in words is "fifty-one billion, nine hundred thirty-one million, six hundred seventy-six thousand, six hundred forty-five".