13613492661 has 4 divisors (see below), whose sum is σ = 18151323552. Its totient is φ = 9075661772.

The previous prime is 13613492653. The next prime is 13613492663. The reversal of 13613492661 is 16629431631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13613492661 - 2³ = 13613492653 is a prime.

It is a super-2 number, since 2×13613492661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13613492663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2268915441 + ... + 2268915446.

It is an arithmetic number, because the mean of its divisors is an integer number (4537830888).

Almost surely, 2^13613492661 is an apocalyptic number.

It is an amenable number.

13613492661 is a deficient number, since it is larger than the sum of its proper divisors (4537830891).

13613492661 is an equidigital number, since it uses as much as digits as its factorization.

13613492661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537830890.

The product of its digits is 139968, while the sum is 42.

The spelling of 13613492661 in words is "thirteen billion, six hundred thirteen million, four hundred ninety-two thousand, six hundred sixty-one".