8975564657 has 2 divisors, whose sum is σ = 8975564658. Its totient is φ = 8975564656.

The previous prime is 8975564593. The next prime is 8975564683. The reversal of 8975564657 is 7564655798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7150224481 + 1825340176 = 84559^2 + 42724^2 .

It is a cyclic number.

It is not a de Polignac number, because 8975564657 - 2⁶ = 8975564593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8975564657.

It is not a weakly prime, because it can be changed into another prime (8975564057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4487782328 + 4487782329.

It is an arithmetic number, because the mean of its divisors is an integer number (4487782329).

Almost surely, 2^8975564657 is an apocalyptic number.

It is an amenable number.

8975564657 is a deficient number, since it is larger than the sum of its proper divisors (1).

8975564657 is an equidigital number, since it uses as much as digits as its factorization.

8975564657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504000, while the sum is 62.

The square root of 8975564657 is about 94739.4567062742. The cubic root of 8975564657 is about 2078.1996145044.

The spelling of 8975564657 in words is "eight billion, nine hundred seventy-five million, five hundred sixty-four thousand, six hundred fifty-seven".