12618590557 has 2 divisors, whose sum is σ = 12618590558. Its totient is φ = 12618590556.

The previous prime is 12618590549. The next prime is 12618590563. The reversal of 12618590557 is 75509581621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11241512676 + 1377077881 = 106026^2 + 37109^2 .

It is a cyclic number.

It is not a de Polignac number, because 12618590557 - 2³ = 12618590549 is a prime.

It is the 112333-rd Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 12618590557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12618590057) by changing a digit.

It is a nontrivial repunit in base 112332.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6309295278 + 6309295279.

It is an arithmetic number, because the mean of its divisors is an integer number (6309295279).

Almost surely, 2^12618590557 is an apocalyptic number.

It is an amenable number.

12618590557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12618590557 is an equidigital number, since it uses as much as digits as its factorization.

12618590557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 12618590557 in words is "twelve billion, six hundred eighteen million, five hundred ninety thousand, five hundred fifty-seven".