185980661815680 has 256 divisors, whose sum is σ = 666813386116800. Its totient is φ = 49594842777600.

The previous prime is 185980661815639. The next prime is 185980661815717. The reversal of 185980661815680 is 86518166089581.

185980661815680 is a `hidden beast` number, since 1 + 8 + 59 + 8 + 0 + 6 + 6 + 1 + 8 + 1 + 568 + 0 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 185980661815599 and 185980661815608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65037171 + ... + 67836530.

Almost surely, 2^{185980661815680} is an apocalyptic number.

185980661815680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185980661815680 is an abundant number, since it is smaller than the sum of its proper divisors (480832724301120).

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

185980661815680 is an frugal number, since it uses more digits than its factorization.

185980661815680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132873741 (or 132873711 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 72.

The spelling of 185980661815680 in words is "one hundred eighty-five trillion, nine hundred eighty billion, six hundred sixty-one million, eight hundred fifteen thousand, six hundred eighty".