51101001000639 has 12 divisors (see below), whose sum is σ = 73812618955296. Its totient is φ = 34067305406112.

The previous prime is 51101001000527. The next prime is 51101001000701. The reversal of 51101001000639 is 93600010010115.

51101001000639 is a `hidden beast` number, since 5 + 1 + 1 + 0 + 10 + 0 + 10 + 0 + 0 + 639 = 666.

It is not a de Polignac number, because 51101001000639 - 2³⁹ = 50551245186751 is a prime.

It is a super-2 number, since 2×51101001000639² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51101001000139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20144842 + ... + 22539224.

It is an arithmetic number, because the mean of its divisors is an integer number (6151051579608).

Almost surely, 2^{51101001000639} is an apocalyptic number.

51101001000639 is a deficient number, since it is larger than the sum of its proper divisors (22711617954657).

51101001000639 is a wasteful number, since it uses less digits than its factorization.

51101001000639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765726 (or 4765723 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The spelling of 51101001000639 in words is "fifty-one trillion, one hundred one billion, one million, six hundred thirty-nine", and thus it is an aban number.