12579099517 has 2 divisors, whose sum is σ = 12579099518. Its totient is φ = 12579099516.

The previous prime is 12579099503. The next prime is 12579099523. The reversal of 12579099517 is 71599097521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12575155321 + 3944196 = 112139^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 12579099517 - 2²³ = 12570710909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12579009517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6289549758 + 6289549759.

It is an arithmetic number, because the mean of its divisors is an integer number (6289549759).

Almost surely, 2^12579099517 is an apocalyptic number.

It is an amenable number.

12579099517 is a deficient number, since it is larger than the sum of its proper divisors (1).

12579099517 is an equidigital number, since it uses as much as digits as its factorization.

12579099517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1786050, while the sum is 55.

The spelling of 12579099517 in words is "twelve billion, five hundred seventy-nine million, ninety-nine thousand, five hundred seventeen".