12640762738 has 16 divisors (see below), whose sum is σ = 20183364000. Its totient is φ = 5920450272.

The previous prime is 12640762697. The next prime is 12640762781. The reversal of 12640762738 is 83726704621.

12640762738 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865448 + ... + 1872211.

It is an arithmetic number, because the mean of its divisors is an integer number (1261460250).

Almost surely, 2^12640762738 is an apocalyptic number.

12640762738 is a deficient number, since it is larger than the sum of its proper divisors (7542601262).

12640762738 is a wasteful number, since it uses less digits than its factorization.

12640762738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737769.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 12640762738 in words is "twelve billion, six hundred forty million, seven hundred sixty-two thousand, seven hundred thirty-eight".