18578578568 has 32 divisors (see below), whose sum is σ = 38459504160. Its totient is φ = 8343060480.

The previous prime is 18578578567. The next prime is 18578578633. The reversal of 18578578568 is 86587587581.

It is a junction number, because it is equal to n+sod(n) for n = 18578578498 and 18578578507.

It is not an unprimeable number, because it can be changed into a prime (18578578561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264505 + ... + 1279112.

It is an arithmetic number, because the mean of its divisors is an integer number (1201859505).

Almost surely, 2^18578578568 is an apocalyptic number.

It is an amenable number.

18578578568 is an abundant number, since it is smaller than the sum of its proper divisors (19880925592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18578578568 is a wasteful number, since it uses less digits than its factorization.

18578578568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543717 (or 2543713 counting only the distinct ones).

The product of its digits is 150528000, while the sum is 68.

The spelling of 18578578568 in words is "eighteen billion, five hundred seventy-eight million, five hundred seventy-eight thousand, five hundred sixty-eight".