51507662570661 has 24 divisors (see below), whose sum is σ = 75878942688640. Its totient is φ = 31055020254720.

The previous prime is 51507662570659. The next prime is 51507662570701. The reversal of 51507662570661 is 16607526670515.

It is not a de Polignac number, because 51507662570661 - 2¹ = 51507662570659 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51507662500661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 367531981 + ... + 367672098.

Almost surely, 2^{51507662570661} is an apocalyptic number.

It is an amenable number.

51507662570661 is a deficient number, since it is larger than the sum of its proper divisors (24371280117979).

51507662570661 is a wasteful number, since it uses less digits than its factorization.

51507662570661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735204297 (or 735204286 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 57.

The spelling of 51507662570661 in words is "fifty-one trillion, five hundred seven billion, six hundred sixty-two million, five hundred seventy thousand, six hundred sixty-one".