9640118557 has 2 divisors, whose sum is σ = 9640118558. Its totient is φ = 9640118556.

The previous prime is 9640118539. The next prime is 9640118561. The reversal of 9640118557 is 7558110469.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7435440441 + 2204678116 = 86229^2 + 46954^2 .

It is a cyclic number.

It is not a de Polignac number, because 9640118557 - 2⁷ = 9640118429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9640118567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820059278 + 4820059279.

It is an arithmetic number, because the mean of its divisors is an integer number (4820059279).

Almost surely, 2^9640118557 is an apocalyptic number.

It is an amenable number.

9640118557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640118557 is an equidigital number, since it uses as much as digits as its factorization.

9640118557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 9640118557 is about 98184.1054193600. The cubic root of 9640118557 is about 2128.2736021713.

The spelling of 9640118557 in words is "nine billion, six hundred forty million, one hundred eighteen thousand, five hundred fifty-seven".