126513200617 has 2 divisors, whose sum is σ = 126513200618. Its totient is φ = 126513200616.

The previous prime is 126513200581. The next prime is 126513200623. The reversal of 126513200617 is 716002315621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121296172176 + 5217028441 = 348276^2 + 72229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126513200617 is a prime.

It is not a weakly prime, because it can be changed into another prime (126513200657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63256600308 + 63256600309.

It is an arithmetic number, because the mean of its divisors is an integer number (63256600309).

Almost surely, 2^126513200617 is an apocalyptic number.

It is an amenable number.

126513200617 is a deficient number, since it is larger than the sum of its proper divisors (1).

126513200617 is an equidigital number, since it uses as much as digits as its factorization.

126513200617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 126513200617 in words is "one hundred twenty-six billion, five hundred thirteen million, two hundred thousand, six hundred seventeen".