79581241717 has 2 divisors, whose sum is σ = 79581241718. Its totient is φ = 79581241716.

The previous prime is 79581241697. The next prime is 79581241759. The reversal of 79581241717 is 71714218597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72620009361 + 6961232356 = 269481^2 + 83434^2 .

It is a cyclic number.

It is not a de Polignac number, because 79581241717 - 2²³ = 79572853109 is a prime.

It is a super-2 number, since 2×79581241717² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79581241217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39790620858 + 39790620859.

It is an arithmetic number, because the mean of its divisors is an integer number (39790620859).

Almost surely, 2^79581241717 is an apocalyptic number.

It is an amenable number.

79581241717 is a deficient number, since it is larger than the sum of its proper divisors (1).

79581241717 is an equidigital number, since it uses as much as digits as its factorization.

79581241717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 52.

The spelling of 79581241717 in words is "seventy-nine billion, five hundred eighty-one million, two hundred forty-one thousand, seven hundred seventeen".