12610391638 has 36 divisors (see below), whose sum is σ = 20641659948. Its totient is φ = 5775316560.

The previous prime is 12610391627. The next prime is 12610391641. The reversal of 12610391638 is 83619301621.

It is a self number, because there is not a number n which added to its sum of digits gives 12610391638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6529533 + ... + 6531463.

It is an arithmetic number, because the mean of its divisors is an integer number (573379443).

Almost surely, 2^12610391638 is an apocalyptic number.

12610391638 is a deficient number, since it is larger than the sum of its proper divisors (8031268310).

12610391638 is a wasteful number, since it uses less digits than its factorization.

12610391638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 12610391638 in words is "twelve billion, six hundred ten million, three hundred ninety-one thousand, six hundred thirty-eight".