18279607664 has 20 divisors (see below), whose sum is σ = 35426098656. Its totient is φ = 9137388672.

The previous prime is 18279607637. The next prime is 18279607667. The reversal of 18279607664 is 46670697281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18279607667) 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, 87704 + ... + 210359.

Almost surely, 2^18279607664 is an apocalyptic number.

It is an amenable number.

18279607664 is a deficient number, since it is larger than the sum of its proper divisors (17146490992).

18279607664 is a wasteful number, since it uses less digits than its factorization.

18279607664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301904 (or 301898 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 18279607664 in words is "eighteen billion, two hundred seventy-nine million, six hundred seven thousand, six hundred sixty-four".