9645659957 has 2 divisors, whose sum is σ = 9645659958. Its totient is φ = 9645659956.

The previous prime is 9645659941. The next prime is 9645660019. The reversal of 9645659957 is 7599565469.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9548025796 + 97634161 = 97714^2 + 9881^2 .

It is a cyclic number.

It is not a de Polignac number, because 9645659957 - 2⁴ = 9645659941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9645659893 and 9645659902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9645659917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4822829978 + 4822829979.

It is an arithmetic number, because the mean of its divisors is an integer number (4822829979).

Almost surely, 2^9645659957 is an apocalyptic number.

It is an amenable number.

9645659957 is a deficient number, since it is larger than the sum of its proper divisors (1).

9645659957 is an equidigital number, since it uses as much as digits as its factorization.

9645659957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854000, while the sum is 65.

The square root of 9645659957 is about 98212.3208003965. The cubic root of 9645659957 is about 2128.6813204038.

The spelling of 9645659957 in words is "nine billion, six hundred forty-five million, six hundred fifty-nine thousand, nine hundred fifty-seven".