15791157566641 has 4 divisors (see below), whose sum is σ = 16622271122800. Its totient is φ = 14960044010484.

The previous prime is 15791157566623. The next prime is 15791157566669. The reversal of 15791157566641 is 14666575119751.

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 15791157566641 - 2²³ = 15791149178033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15791157566341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415556778051 + ... + 415556778088.

It is an arithmetic number, because the mean of its divisors is an integer number (4155567780700).

Almost surely, 2^{15791157566641} is an apocalyptic number.

It is an amenable number.

15791157566641 is a deficient number, since it is larger than the sum of its proper divisors (831113556159).

15791157566641 is an equidigital number, since it uses as much as digits as its factorization.

15791157566641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831113556158.

The product of its digits is 47628000, while the sum is 64.

The spelling of 15791157566641 in words is "fifteen trillion, seven hundred ninety-one billion, one hundred fifty-seven million, five hundred sixty-six thousand, six hundred forty-one".