18377982578 has 16 divisors (see below), whose sum is σ = 28145675040. Its totient is φ = 8997902496.

The previous prime is 18377982569. The next prime is 18377982587. The reversal of 18377982578 is 87528977381.

It is an interprime number because it is at equal distance from previous prime (18377982569) and next prime (18377982587).

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, 432500 + ... + 473087.

It is an arithmetic number, because the mean of its divisors is an integer number (1759104690).

Almost surely, 2^18377982578 is an apocalyptic number.

18377982578 is a deficient number, since it is larger than the sum of its proper divisors (9767692462).

18377982578 is a wasteful number, since it uses less digits than its factorization.

18377982578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905801.

The product of its digits is 47416320, while the sum is 65.

The spelling of 18377982578 in words is "eighteen billion, three hundred seventy-seven million, nine hundred eighty-two thousand, five hundred seventy-eight".