97577566417 has 2 divisors, whose sum is σ = 97577566418. Its totient is φ = 97577566416.

The previous prime is 97577566393. The next prime is 97577566477. The reversal of 97577566417 is 71466577579.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97346496016 + 231070401 = 312004^2 + 15201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97577566417 is a prime.

It is not a weakly prime, because it can be changed into another prime (97577566477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48788783208 + 48788783209.

It is an arithmetic number, because the mean of its divisors is an integer number (48788783209).

Almost surely, 2^97577566417 is an apocalyptic number.

It is an amenable number.

97577566417 is a deficient number, since it is larger than the sum of its proper divisors (1).

97577566417 is an equidigital number, since it uses as much as digits as its factorization.

97577566417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77792400, while the sum is 64.

The spelling of 97577566417 in words is "ninety-seven billion, five hundred seventy-seven million, five hundred sixty-six thousand, four hundred seventeen".