1253642688917 has 2 divisors, whose sum is σ = 1253642688918. Its totient is φ = 1253642688916.

The previous prime is 1253642688871. The next prime is 1253642688943. The reversal of 1253642688917 is 7198862463521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184460012241 + 69182676676 = 1088329^2 + 263026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253642688917 - 2³⁰ = 1252568947093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1253642688917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253642648917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626821344458 + 626821344459.

It is an arithmetic number, because the mean of its divisors is an integer number (626821344459).

Almost surely, 2^{1253642688917} is an apocalyptic number.

It is an amenable number.

1253642688917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253642688917 is an equidigital number, since it uses as much as digits as its factorization.

1253642688917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 62.

The spelling of 1253642688917 in words is "one trillion, two hundred fifty-three billion, six hundred forty-two million, six hundred eighty-eight thousand, nine hundred seventeen".