12440629431 has 16 divisors (see below), whose sum is σ = 18435276000. Its totient is φ = 8291631744.

The previous prime is 12440629423. The next prime is 12440629433. The reversal of 12440629431 is 13492604421.

12440629431 is a `hidden beast` number, since 1 + 24 + 4 + 0 + 629 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 12440629431 - 2³ = 12440629423 is a prime.

It is a super-2 number, since 2×12440629431² (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 (12440629433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52425 + ... + 166221.

It is an arithmetic number, because the mean of its divisors is an integer number (1152204750).

Almost surely, 2^12440629431 is an apocalyptic number.

12440629431 is a deficient number, since it is larger than the sum of its proper divisors (5994646569).

12440629431 is a wasteful number, since it uses less digits than its factorization.

12440629431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117855 (or 117849 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 12440629431 in words is "twelve billion, four hundred forty million, six hundred twenty-nine thousand, four hundred thirty-one".