13161535566 has 32 divisors (see below), whose sum is σ = 27692323200. Its totient is φ = 4164098400.

The previous prime is 13161535523. The next prime is 13161535573. The reversal of 13161535566 is 66553516131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630760 + ... + 651291.

It is an arithmetic number, because the mean of its divisors is an integer number (865385100).

Almost surely, 2^13161535566 is an apocalyptic number.

13161535566 is an abundant number, since it is smaller than the sum of its proper divisors (14530787634).

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

13161535566 is a wasteful number, since it uses less digits than its factorization.

13161535566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282144.

The product of its digits is 243000, while the sum is 42.

The spelling of 13161535566 in words is "thirteen billion, one hundred sixty-one million, five hundred thirty-five thousand, five hundred sixty-six".