18158408268 has 96 divisors (see below), whose sum is σ = 56887918080. Its totient is φ = 4353661440.

The previous prime is 18158408263. The next prime is 18158408291. The reversal of 18158408268 is 86280485181.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18158408268.

It is not an unprimeable number, because it can be changed into a prime (18158408263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 743833 + ... + 767856.

It is an arithmetic number, because the mean of its divisors is an integer number (592582480).

Almost surely, 2^18158408268 is an apocalyptic number.

It is an amenable number.

18158408268 is an abundant number, since it is smaller than the sum of its proper divisors (38729509812).

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

18158408268 is a wasteful number, since it uses less digits than its factorization.

18158408268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511727 (or 1511725 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 51.

It can be divided in two parts, 18158 and 408268, that added together give a triangular number (426426 = T₉₂₃).

The spelling of 18158408268 in words is "eighteen billion, one hundred fifty-eight million, four hundred eight thousand, two hundred sixty-eight".