51682310681 has 16 divisors (see below), whose sum is σ = 52219728000. Its totient is φ = 51148704768.

The previous prime is 51682310663. The next prime is 51682310711. The reversal of 51682310681 is 18601328615.

It is a cyclic number.

It is not a de Polignac number, because 51682310681 - 2¹⁴ = 51682294297 is a prime.

It is a super-2 number, since 2×51682310681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51682310621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31764590 + ... + 31766216.

It is an arithmetic number, because the mean of its divisors is an integer number (3263733000).

Almost surely, 2^51682310681 is an apocalyptic number.

It is an amenable number.

51682310681 is a deficient number, since it is larger than the sum of its proper divisors (537417319).

51682310681 is a wasteful number, since it uses less digits than its factorization.

51682310681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 51682310681 in words is "fifty-one billion, six hundred eighty-two million, three hundred ten thousand, six hundred eighty-one".