13051685645831 has 64 divisors (see below), whose sum is σ = 15943531069440. Its totient is φ = 10441763861760.

The previous prime is 13051685645821. The next prime is 13051685645833. The reversal of 13051685645831 is 13854658615031.

It is a de Polignac number, because none of the positive numbers 2^k-13051685645831 is a prime.

It is a super-2 number, since 2×13051685645831² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13051685645833) 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, 4255520360 + ... + 4255523426.

It is an arithmetic number, because the mean of its divisors is an integer number (249117672960).

Almost surely, 2^{13051685645831} is an apocalyptic number.

13051685645831 is a deficient number, since it is larger than the sum of its proper divisors (2891845423609).

13051685645831 is a wasteful number, since it uses less digits than its factorization.

13051685645831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 13051685645831 in words is "thirteen trillion, fifty-one billion, six hundred eighty-five million, six hundred forty-five thousand, eight hundred thirty-one".