18116864570 has 48 divisors (see below), whose sum is σ = 37947246120. Its totient is φ = 6209409024.

The previous prime is 18116864561. The next prime is 18116864581. The reversal of 18116864570 is 7546861181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14029691809 + 4087172761 = 118447^2 + 63931^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2415386 + ... + 2422874.

Almost surely, 2^18116864570 is an apocalyptic number.

18116864570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18116864570 is an abundant number, since it is smaller than the sum of its proper divisors (19830381550).

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

18116864570 is a wasteful number, since it uses less digits than its factorization.

18116864570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12447 (or 12440 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 18116864570 in words is "eighteen billion, one hundred sixteen million, eight hundred sixty-four thousand, five hundred seventy".