131559929259561 has 36 divisors (see below), whose sum is σ = 208906983702144. Its totient is φ = 79721867652240.

The previous prime is 131559929259511. The next prime is 131559929259571. The reversal of 131559929259561 is 165952929955131.

131559929259561 is a `hidden beast` number, since 1 + 3 + 1 + 5 + 5 + 9 + 9 + 2 + 9 + 2 + 59 + 561 = 666.

It is not a de Polignac number, because 131559929259561 - 2⁷ = 131559929259433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131559929259561.

It is not an unprimeable number, because it can be changed into a prime (131559929259511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1045665 + ... + 16254638.

It is an arithmetic number, because the mean of its divisors is an integer number (5802971769504).

Almost surely, 2^{131559929259561} is an apocalyptic number.

131559929259561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131559929259561 is a deficient number, since it is larger than the sum of its proper divisors (77347054442583).

131559929259561 is a wasteful number, since it uses less digits than its factorization.

131559929259561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17307314 (or 17307300 counting only the distinct ones).

The product of its digits is 295245000, while the sum is 72.

The spelling of 131559929259561 in words is "one hundred thirty-one trillion, five hundred fifty-nine billion, nine hundred twenty-nine million, two hundred fifty-nine thousand, five hundred sixty-one".