51361172037 has 32 divisors (see below), whose sum is σ = 87001647360. Its totient is φ = 29335426560.

The previous prime is 51361172029. The next prime is 51361172041. The reversal of 51361172037 is 73027116315.

51361172037 is a `hidden beast` number, since 5 + 1 + 3 + 611 + 7 + 2 + 0 + 37 = 666.

It is not a de Polignac number, because 51361172037 - 2³ = 51361172029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51361171992 and 51361172010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51361172437) 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, 345553 + ... + 471305.

It is an arithmetic number, because the mean of its divisors is an integer number (2718801480).

Almost surely, 2^51361172037 is an apocalyptic number.

It is an amenable number.

51361172037 is a deficient number, since it is larger than the sum of its proper divisors (35640475323).

51361172037 is a wasteful number, since it uses less digits than its factorization.

51361172037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127930 (or 127924 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The spelling of 51361172037 in words is "fifty-one billion, three hundred sixty-one million, one hundred seventy-two thousand, thirty-seven".