15791157566669 has 2 divisors, whose sum is σ = 15791157566670. Its totient is φ = 15791157566668.

The previous prime is 15791157566623. The next prime is 15791157566711. The reversal of 15791157566669 is 96666575119751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15722533477225 + 68624089444 = 3965165^2 + 261962^2 .

It is a cyclic number.

It is not a de Polignac number, because 15791157566669 - 2²⁴ = 15791140789453 is a prime.

It is a super-2 number, since 2×15791157566669² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15791157566596 and 15791157566605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15791157566969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7895578783334 + 7895578783335.

It is an arithmetic number, because the mean of its divisors is an integer number (7895578783335).

Almost surely, 2^{15791157566669} is an apocalyptic number.

It is an amenable number.

15791157566669 is a deficient number, since it is larger than the sum of its proper divisors (1).

15791157566669 is an equidigital number, since it uses as much as digits as its factorization.

15791157566669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978000, while the sum is 74.

The spelling of 15791157566669 in words is "fifteen trillion, seven hundred ninety-one billion, one hundred fifty-seven million, five hundred sixty-six thousand, six hundred sixty-nine".