51839175120681 has 64 divisors (see below), whose sum is σ = 79497864585216. Its totient is φ = 29764571366400.

The previous prime is 51839175120643. The next prime is 51839175120683. The reversal of 51839175120681 is 18602157193815.

It is not a de Polignac number, because 51839175120681 - 2¹⁵ = 51839175087913 is a prime.

It is a super-2 number, since 2×51839175120681² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51839175120683) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 84026920 + ... + 84641606.

It is an arithmetic number, because the mean of its divisors is an integer number (1242154134144).

Almost surely, 2^{51839175120681} is an apocalyptic number.

51839175120681 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

51839175120681 is a deficient number, since it is larger than the sum of its proper divisors (27658689464535).

51839175120681 is a wasteful number, since it uses less digits than its factorization.

51839175120681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615822.

The product of its (nonzero) digits is 3628800, while the sum is 57.

The spelling of 51839175120681 in words is "fifty-one trillion, eight hundred thirty-nine billion, one hundred seventy-five million, one hundred twenty thousand, six hundred eighty-one".