18568616831380 has 96 divisors (see below), whose sum is σ = 48616926688512. Its totient is φ = 5787512294400.

The previous prime is 18568616831353. The next prime is 18568616831383. The reversal of 18568616831380 is 8313861686581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18568616831383) 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, 132580990 + ... + 132720970.

It is an arithmetic number, because the mean of its divisors is an integer number (506426319672).

Almost surely, 2^{18568616831380} is an apocalyptic number.

18568616831380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18568616831380 is an abundant number, since it is smaller than the sum of its proper divisors (30048309857132).

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

18568616831380 is a wasteful number, since it uses less digits than its factorization.

18568616831380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226145 (or 226143 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 18568616831380 in words is "eighteen trillion, five hundred sixty-eight billion, six hundred sixteen million, eight hundred thirty-one thousand, three hundred eighty".