18478365435680 has 48 divisors (see below), whose sum is σ = 44306707596480. Its totient is φ = 7281027570432.

The previous prime is 18478365435661. The next prime is 18478365435697. The reversal of 18478365435680 is 8653456387481.

It is a self number, because there is not a number n which added to its sum of digits gives 18478365435680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861853340 + ... + 861874779.

It is an arithmetic number, because the mean of its divisors is an integer number (923056408260).

Almost surely, 2^{18478365435680} is an apocalyptic number.

18478365435680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18478365435680 is an abundant number, since it is smaller than the sum of its proper divisors (25828342160800).

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

18478365435680 is a wasteful number, since it uses less digits than its factorization.

18478365435680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723728201 (or 1723728193 counting only the distinct ones).

The product of its (nonzero) digits is 464486400, while the sum is 68.

The spelling of 18478365435680 in words is "eighteen trillion, four hundred seventy-eight billion, three hundred sixty-five million, four hundred thirty-five thousand, six hundred eighty".