18157915408 has 20 divisors (see below), whose sum is σ = 35509758480. Its totient is φ = 8994106784.

The previous prime is 18157915367. The next prime is 18157915411. The reversal of 18157915408 is 80451975181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5301418 + ... + 5304841.

It is an arithmetic number, because the mean of its divisors is an integer number (1775487924).

Almost surely, 2^18157915408 is an apocalyptic number.

It is an amenable number.

18157915408 is a deficient number, since it is larger than the sum of its proper divisors (17351843072).

18157915408 is a wasteful number, since it uses less digits than its factorization.

18157915408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606374 (or 10606368 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 49.

The spelling of 18157915408 in words is "eighteen billion, one hundred fifty-seven million, nine hundred fifteen thousand, four hundred eight".