12640452629 has 12 divisors (see below), whose sum is σ = 15569153964. Its totient is φ = 10197339264.

The previous prime is 12640452571. The next prime is 12640452653. The reversal of 12640452629 is 92625404621.

It can be written as a sum of positive squares in 2 ways, for example, as 8649372004 + 3991080625 = 93002^2 + 63175^2 .

It is not a de Polignac number, because 12640452629 - 2¹² = 12640448533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640452659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7586474 + ... + 7588139.

It is an arithmetic number, because the mean of its divisors is an integer number (1297429497).

Almost surely, 2^12640452629 is an apocalyptic number.

It is an amenable number.

12640452629 is a deficient number, since it is larger than the sum of its proper divisors (2928701335).

12640452629 is a wasteful number, since it uses less digits than its factorization.

12640452629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15174644 (or 15174637 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 12640452629 in words is "twelve billion, six hundred forty million, four hundred fifty-two thousand, six hundred twenty-nine".