13161315165534 has 80 divisors (see below), whose sum is σ = 31436211206400. Its totient is φ = 4103594526096.

The previous prime is 13161315165521. The next prime is 13161315165571. The reversal of 13161315165534 is 43556151316131.

13161315165534 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 1 + 3 + 1 + 51 + 65 + 534 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13161315165534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26819692 + ... + 27306015.

It is an arithmetic number, because the mean of its divisors is an integer number (392952640080).

Almost surely, 2^{13161315165534} is an apocalyptic number.

13161315165534 is an abundant number, since it is smaller than the sum of its proper divisors (18274896040866).

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

13161315165534 is a wasteful number, since it uses less digits than its factorization.

13161315165534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54125819 (or 54125810 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The spelling of 13161315165534 in words is "thirteen trillion, one hundred sixty-one billion, three hundred fifteen million, one hundred sixty-five thousand, five hundred thirty-four".