12577235917 has 2 divisors, whose sum is σ = 12577235918. Its totient is φ = 12577235916.

The previous prime is 12577235911. The next prime is 12577235921. The reversal of 12577235917 is 71953277521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8561985961 + 4015249956 = 92531^2 + 63366^2 .

It is an emirp because it is prime and its reverse (71953277521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12577235917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12577235911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6288617958 + 6288617959.

It is an arithmetic number, because the mean of its divisors is an integer number (6288617959).

Almost surely, 2^12577235917 is an apocalyptic number.

It is an amenable number.

12577235917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12577235917 is an equidigital number, since it uses as much as digits as its factorization.

12577235917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 926100, while the sum is 49.

The spelling of 12577235917 in words is "twelve billion, five hundred seventy-seven million, two hundred thirty-five thousand, nine hundred seventeen".