18659357298816 has 128 divisors (see below), whose sum is σ = 53519632837440. Its totient is φ = 5725947801600.

The previous prime is 18659357298793. The next prime is 18659357298847. The reversal of 18659357298816 is 61889275395681.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×18659357298816² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3148510 + ... + 6872541.

Almost surely, 2^{18659357298816} is an apocalyptic number.

18659357298816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18659357298816 is an abundant number, since it is smaller than the sum of its proper divisors (34860275538624).

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

18659357298816 is a wasteful number, since it uses less digits than its factorization.

18659357298816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10021454 (or 10021442 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 78.

The spelling of 18659357298816 in words is "eighteen trillion, six hundred fifty-nine billion, three hundred fifty-seven million, two hundred ninety-eight thousand, eight hundred sixteen".