12640253031 has 24 divisors (see below), whose sum is σ = 21177896064. Its totient is φ = 7115193360.

The previous prime is 12640252957. The next prime is 12640253033. The reversal of 12640253031 is 13035204621.

12640253031 is a `hidden beast` number, since 12 + 640 + 2 + 5 + 3 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 12640253031 - 2¹⁸ = 12639990887 is a prime.

It is a super-2 number, since 2×12640253031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12640252986 and 12640253004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640253033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1493085 + ... + 1501526.

It is an arithmetic number, because the mean of its divisors is an integer number (882412336).

Almost surely, 2^12640253031 is an apocalyptic number.

12640253031 is a deficient number, since it is larger than the sum of its proper divisors (8537643033).

12640253031 is a wasteful number, since it uses less digits than its factorization.

12640253031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994691 (or 2994688 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12640253031 its reverse (13035204621), we get a palindrome (25675457652).

The spelling of 12640253031 in words is "twelve billion, six hundred forty million, two hundred fifty-three thousand, thirty-one".