18399437959576 has 16 divisors (see below), whose sum is σ = 34517424480840. Its totient is φ = 9194791431360.

The previous prime is 18399437959549. The next prime is 18399437959579. The reversal of 18399437959576 is 67595973499381.

It is a junction number, because it is equal to n+sod(n) for n = 18399437959493 and 18399437959502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18399437959579) 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, 615927685 + ... + 615957556.

Almost surely, 2^{18399437959576} is an apocalyptic number.

It is an amenable number.

18399437959576 is a deficient number, since it is larger than the sum of its proper divisors (16117986521264).

18399437959576 is a wasteful number, since it uses less digits than its factorization.

18399437959576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231887114 (or 1231887110 counting only the distinct ones).

The product of its digits is 13888324800, while the sum is 85.

The spelling of 18399437959576 in words is "eighteen trillion, three hundred ninety-nine billion, four hundred thirty-seven million, nine hundred fifty-nine thousand, five hundred seventy-six".