18044661464 has 16 divisors (see below), whose sum is σ = 34162224720. Its totient is φ = 8934734880.

The previous prime is 18044661337. The next prime is 18044661469. The reversal of 18044661464 is 46416644081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18044661469) 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, 10948607 + ... + 10950254.

It is an arithmetic number, because the mean of its divisors is an integer number (2135139045).

Almost surely, 2^18044661464 is an apocalyptic number.

It is an amenable number.

18044661464 is a deficient number, since it is larger than the sum of its proper divisors (16117563256).

18044661464 is a wasteful number, since it uses less digits than its factorization.

18044661464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21898970 (or 21898966 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 18044661464 in words is "eighteen billion, forty-four million, six hundred sixty-one thousand, four hundred sixty-four".