11956631631 has 8 divisors (see below), whose sum is σ = 18219629184. Its totient is φ = 6832360920.

The previous prime is 11956631629. The next prime is 11956631639. The reversal of 11956631631 is 13613665911.

It is a happy number.

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

It is not a de Polignac number, because 11956631631 - 2¹ = 11956631629 is a prime.

It is a super-2 number, since 2×11956631631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11956631639) 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, 284681685 + ... + 284681726.

It is an arithmetic number, because the mean of its divisors is an integer number (2277453648).

Almost surely, 2^11956631631 is an apocalyptic number.

11956631631 is a deficient number, since it is larger than the sum of its proper divisors (6262997553).

11956631631 is an equidigital number, since it uses as much as digits as its factorization.

11956631631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569363421.

The product of its digits is 87480, while the sum is 42.

The spelling of 11956631631 in words is "eleven billion, nine hundred fifty-six million, six hundred thirty-one thousand, six hundred thirty-one".