172668552097 has 2 divisors, whose sum is σ = 172668552098. Its totient is φ = 172668552096.

The previous prime is 172668552071. The next prime is 172668552109. The reversal of 172668552097 is 790255866271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172166075041 + 502477056 = 414929^2 + 22416^2 .

It is a cyclic number.

It is not a de Polignac number, because 172668552097 - 2⁷ = 172668551969 is a prime.

It is not a weakly prime, because it can be changed into another prime (172668552037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86334276048 + 86334276049.

It is an arithmetic number, because the mean of its divisors is an integer number (86334276049).

Almost surely, 2^172668552097 is an apocalyptic number.

It is an amenable number.

172668552097 is a deficient number, since it is larger than the sum of its proper divisors (1).

172668552097 is an equidigital number, since it uses as much as digits as its factorization.

172668552097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 172668552097 in words is "one hundred seventy-two billion, six hundred sixty-eight million, five hundred fifty-two thousand, ninety-seven".