13156742661 has 8 divisors (see below), whose sum is σ = 17544605760. Its totient is φ = 8770020672.

The previous prime is 13156742657. The next prime is 13156742681. The reversal of 13156742661 is 16624765131.

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

It is not a de Polignac number, because 13156742661 - 2² = 13156742657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156742611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258001 + ... + 304758.

It is an arithmetic number, because the mean of its divisors is an integer number (2193075720).

Almost surely, 2^13156742661 is an apocalyptic number.

It is an amenable number.

13156742661 is a deficient number, since it is larger than the sum of its proper divisors (4387863099).

13156742661 is an equidigital number, since it uses as much as digits as its factorization.

13156742661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570555.

The product of its digits is 181440, while the sum is 42.

The spelling of 13156742661 in words is "thirteen billion, one hundred fifty-six million, seven hundred forty-two thousand, six hundred sixty-one".