51661514037 has 32 divisors (see below), whose sum is σ = 82197068800. Its totient is φ = 28834308720.

The previous prime is 51661514033. The next prime is 51661514059. The reversal of 51661514037 is 73041516615.

It is not a de Polignac number, because 51661514037 - 2² = 51661514033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51661513986 and 51661514004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51661514033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 539539 + ... + 628032.

It is an arithmetic number, because the mean of its divisors is an integer number (2568658400).

Almost surely, 2^51661514037 is an apocalyptic number.

It is an amenable number.

51661514037 is a deficient number, since it is larger than the sum of its proper divisors (30535554763).

51661514037 is a wasteful number, since it uses less digits than its factorization.

51661514037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167638 (or 1167624 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 51661514037 in words is "fifty-one billion, six hundred sixty-one million, five hundred fourteen thousand, thirty-seven".