11631621431 has 8 divisors (see below), whose sum is σ = 11754084720. Its totient is φ = 11509210368.

The previous prime is 11631621413. The next prime is 11631621451. The reversal of 11631621431 is 13412613611.

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 11631621431 - 2²⁶ = 11564512567 is a prime.

It is a super-2 number, since 2×11631621431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11631621394 and 11631621403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11631621451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570725 + ... + 590753.

It is an arithmetic number, because the mean of its divisors is an integer number (1469260590).

Almost surely, 2^11631621431 is an apocalyptic number.

11631621431 is a deficient number, since it is larger than the sum of its proper divisors (122463289).

11631621431 is an equidigital number, since it uses as much as digits as its factorization.

11631621431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26113.

The product of its digits is 2592, while the sum is 29.

The spelling of 11631621431 in words is "eleven billion, six hundred thirty-one million, six hundred twenty-one thousand, four hundred thirty-one".