51656134015 has 8 divisors (see below), whose sum is σ = 61994686608. Its totient is φ = 41320023360.

The previous prime is 51656133979. The next prime is 51656134021. The reversal of 51656134015 is 51043165615.

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

It is a de Polignac number, because none of the positive numbers 2^k-51656134015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563617 + ... + 648826.

It is an arithmetic number, because the mean of its divisors is an integer number (7749335826).

Almost surely, 2^51656134015 is an apocalyptic number.

51656134015 is a deficient number, since it is larger than the sum of its proper divisors (10338552593).

51656134015 is a wasteful number, since it uses less digits than its factorization.

51656134015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220969.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 51656134015 in words is "fifty-one billion, six hundred fifty-six million, one hundred thirty-four thousand, fifteen".