13156661506 has 8 divisors (see below), whose sum is σ = 19828523664. Its totient is φ = 6547153620.

The previous prime is 13156661489. The next prime is 13156661519. The reversal of 13156661506 is 60516665131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15588040 + ... + 15588883.

It is an arithmetic number, because the mean of its divisors is an integer number (2478565458).

Almost surely, 2^13156661506 is an apocalyptic number.

13156661506 is a deficient number, since it is larger than the sum of its proper divisors (6671862158).

13156661506 is a wasteful number, since it uses less digits than its factorization.

13156661506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31177136.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 13156661506 in words is "thirteen billion, one hundred fifty-six million, six hundred sixty-one thousand, five hundred six".