165561151101579 has 12 divisors (see below), whose sum is σ = 239505675984432. Its totient is φ = 110207120245200.

The previous prime is 165561151101529. The next prime is 165561151101581. The reversal of 165561151101579 is 975101151165561.

165561151101579 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 6 + 1 + 1 + 51 + 10 + 1 + 579 = 666.

It is not a de Polignac number, because 165561151101579 - 2⁸ = 165561151101323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165561151101529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13915034487 + ... + 13915046384.

It is an arithmetic number, because the mean of its divisors is an integer number (19958806332036).

Almost surely, 2^{165561151101579} is an apocalyptic number.

165561151101579 is a deficient number, since it is larger than the sum of its proper divisors (73944524882853).

165561151101579 is a wasteful number, since it uses less digits than its factorization.

165561151101579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27830081538 (or 27830081535 counting only the distinct ones).

The product of its (nonzero) digits is 1417500, while the sum is 54.

The spelling of 165561151101579 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, one hundred one thousand, five hundred seventy-nine".