18378810464 has 48 divisors (see below), whose sum is σ = 41366052000. Its totient is φ = 7874018304.

The previous prime is 18378810451. The next prime is 18378810469. The reversal of 18378810464 is 46401887381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18378810469) 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, 760682 + ... + 784470.

It is an arithmetic number, because the mean of its divisors is an integer number (861792750).

Almost surely, 2^18378810464 is an apocalyptic number.

18378810464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18378810464 is an abundant number, since it is smaller than the sum of its proper divisors (22987241536).

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

18378810464 is a wasteful number, since it uses less digits than its factorization.

18378810464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27255 (or 27247 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 18378810464 in words is "eighteen billion, three hundred seventy-eight million, eight hundred ten thousand, four hundred sixty-four".