18661914199760 has 80 divisors (see below), whose sum is σ = 47036009919360. Its totient is φ = 6844920076800.

The previous prime is 18661914199699. The next prime is 18661914199771. The reversal of 18661914199760 is 6799141916681.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 59260670 + ... + 59574749.

It is an arithmetic number, because the mean of its divisors is an integer number (587950123992).

Almost surely, 2^{18661914199760} is an apocalyptic number.

18661914199760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18661914199760 is an abundant number, since it is smaller than the sum of its proper divisors (28374095719600).

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

18661914199760 is a wasteful number, since it uses less digits than its factorization.

18661914199760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118835596 (or 118835590 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 68.

The spelling of 18661914199760 in words is "eighteen trillion, six hundred sixty-one billion, nine hundred fourteen million, one hundred ninety-nine thousand, seven hundred sixty".