12658937617 has 2 divisors, whose sum is σ = 12658937618. Its totient is φ = 12658937616.

The previous prime is 12658937591. The next prime is 12658937651. The reversal of 12658937617 is 71673985621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9382634496 + 3276303121 = 96864^2 + 57239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12658937617 - 2¹⁵ = 12658904849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12658932617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6329468808 + 6329468809.

It is an arithmetic number, because the mean of its divisors is an integer number (6329468809).

Almost surely, 2^12658937617 is an apocalyptic number.

It is an amenable number.

12658937617 is a deficient number, since it is larger than the sum of its proper divisors (1).

12658937617 is an equidigital number, since it uses as much as digits as its factorization.

12658937617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The spelling of 12658937617 in words is "twelve billion, six hundred fifty-eight million, nine hundred thirty-seven thousand, six hundred seventeen".