12625940639 has 4 divisors (see below), whose sum is σ = 13597166856. Its totient is φ = 11654714424.

The previous prime is 12625940633. The next prime is 12625940641. The reversal of 12625940639 is 93604952621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12625940639 - 2⁴ = 12625940623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12625940593 and 12625940602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12625940633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485613089 + ... + 485613114.

It is an arithmetic number, because the mean of its divisors is an integer number (3399291714).

Almost surely, 2^12625940639 is an apocalyptic number.

12625940639 is a deficient number, since it is larger than the sum of its proper divisors (971226217).

12625940639 is an equidigital number, since it uses as much as digits as its factorization.

12625940639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971226216.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 12625940639 in words is "twelve billion, six hundred twenty-five million, nine hundred forty thousand, six hundred thirty-nine".