11731965631 has 8 divisors (see below), whose sum is σ = 12141103680. Its totient is φ = 11323133472.

The previous prime is 11731965617. The next prime is 11731965653. The reversal of 11731965631 is 13656913711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11731965631 - 2¹¹ = 11731963583 is a prime.

It is a super-2 number, since 2×11731965631² (a number of 21 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 (11731965601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2986 + ... + 153208.

It is an arithmetic number, because the mean of its divisors is an integer number (1517637960).

Almost surely, 2^11731965631 is an apocalyptic number.

11731965631 is a deficient number, since it is larger than the sum of its proper divisors (409138049).

11731965631 is a wasteful number, since it uses less digits than its factorization.

11731965631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152945.

The product of its digits is 102060, while the sum is 43.

The spelling of 11731965631 in words is "eleven billion, seven hundred thirty-one million, nine hundred sixty-five thousand, six hundred thirty-one".