15580131158661 has 4 divisors (see below), whose sum is σ = 20773508211552. Its totient is φ = 10386754105772.

The previous prime is 15580131158659. The next prime is 15580131158681. The reversal of 15580131158661 is 16685113108551.

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 15580131158661 - 2¹ = 15580131158659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15580131158681) 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, 2596688526441 + ... + 2596688526446.

It is an arithmetic number, because the mean of its divisors is an integer number (5193377052888).

Almost surely, 2^{15580131158661} is an apocalyptic number.

It is an amenable number.

15580131158661 is a deficient number, since it is larger than the sum of its proper divisors (5193377052891).

15580131158661 is an equidigital number, since it uses as much as digits as its factorization.

15580131158661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193377052890.

The product of its (nonzero) digits is 864000, while the sum is 51.

The spelling of 15580131158661 in words is "fifteen trillion, five hundred eighty billion, one hundred thirty-one million, one hundred fifty-eight thousand, six hundred sixty-one".