185380920728811 has 20 divisors (see below), whose sum is σ = 279041001418344. Its totient is φ = 122643866124000.

The previous prime is 185380920728767. The next prime is 185380920728819. The reversal of 185380920728811 is 118827029083581.

185380920728811 is a `hidden beast` number, since 1 + 8 + 538 + 0 + 9 + 2 + 0 + 7 + 2 + 88 + 11 = 666.

It is not a de Polignac number, because 185380920728811 - 2⁹ = 185380920728299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (185380920728819) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8735307490 + ... + 8735328711.

Almost surely, 2^{185380920728811} is an apocalyptic number.

185380920728811 is a deficient number, since it is larger than the sum of its proper divisors (93660080689533).

185380920728811 is a wasteful number, since it uses less digits than its factorization.

185380920728811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17470636344 (or 17470636335 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 63.

The spelling of 185380920728811 in words is "one hundred eighty-five trillion, three hundred eighty billion, nine hundred twenty million, seven hundred twenty-eight thousand, eight hundred eleven".