12640379025 has 12 divisors (see below), whose sum is σ = 20898760112. Its totient is φ = 6741535440.

The previous prime is 12640378987. The next prime is 12640379047. The reversal of 12640379025 is 52097304621.

It is not a de Polignac number, because 12640379025 - 2¹⁴ = 12640362641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84269119 + ... + 84269268.

Almost surely, 2^12640379025 is an apocalyptic number.

12640379025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12640379025 is a deficient number, since it is larger than the sum of its proper divisors (8258381087).

12640379025 is a wasteful number, since it uses less digits than its factorization.

12640379025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168538400 (or 168538395 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 12640379025 in words is "twelve billion, six hundred forty million, three hundred seventy-nine thousand, twenty-five".