15165614661 has 16 divisors (see below), whose sum is σ = 20386242240. Its totient is φ = 10028027520.

The previous prime is 15165614657. The next prime is 15165614683. The reversal of 15165614661 is 16641656151.

It is not a de Polignac number, because 15165614661 - 2² = 15165614657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15165614561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144585 + ... + 226353.

It is an arithmetic number, because the mean of its divisors is an integer number (1274140140).

Almost surely, 2^15165614661 is an apocalyptic number.

It is an amenable number.

15165614661 is a deficient number, since it is larger than the sum of its proper divisors (5220627579).

15165614661 is a wasteful number, since it uses less digits than its factorization.

15165614661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82276.

The product of its digits is 129600, while the sum is 42.

The spelling of 15165614661 in words is "fifteen billion, one hundred sixty-five million, six hundred fourteen thousand, six hundred sixty-one".