18579985601 has 16 divisors (see below), whose sum is σ = 20096813760. Its totient is φ = 17117542080.

The previous prime is 18579985591. The next prime is 18579985607. The reversal of 18579985601 is 10658997581.

It is a cyclic number.

It is not a de Polignac number, because 18579985601 - 2⁶ = 18579985537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18579985607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1644311 + ... + 1655571.

It is an arithmetic number, because the mean of its divisors is an integer number (1256050860).

Almost surely, 2^18579985601 is an apocalyptic number.

It is an amenable number.

18579985601 is a deficient number, since it is larger than the sum of its proper divisors (1516828159).

18579985601 is a wasteful number, since it uses less digits than its factorization.

18579985601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13664.

The product of its (nonzero) digits is 5443200, while the sum is 59.

The spelling of 18579985601 in words is "eighteen billion, five hundred seventy-nine million, nine hundred eighty-five thousand, six hundred one".