18861596764 has 12 divisors (see below), whose sum is σ = 34949429424. Its totient is φ = 8876045504.

The previous prime is 18861596759. The next prime is 18861596773. The reversal of 18861596764 is 46769516881.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138688144 + ... + 138688279.

It is an arithmetic number, because the mean of its divisors is an integer number (2912452452).

Almost surely, 2^18861596764 is an apocalyptic number.

It is an amenable number.

18861596764 is a deficient number, since it is larger than the sum of its proper divisors (16087832660).

18861596764 is a wasteful number, since it uses less digits than its factorization.

18861596764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277376444 (or 277376442 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The spelling of 18861596764 in words is "eighteen billion, eight hundred sixty-one million, five hundred ninety-six thousand, seven hundred sixty-four".