172716555197 has 2 divisors, whose sum is σ = 172716555198. Its totient is φ = 172716555196.

The previous prime is 172716555173. The next prime is 172716555217. The reversal of 172716555197 is 791555617271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94909589476 + 77806965721 = 308074^2 + 278939^2 .

It is a cyclic number.

It is not a de Polignac number, because 172716555197 - 2¹² = 172716551101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172716555107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86358277598 + 86358277599.

It is an arithmetic number, because the mean of its divisors is an integer number (86358277599).

Almost surely, 2^172716555197 is an apocalyptic number.

It is an amenable number.

172716555197 is a deficient number, since it is larger than the sum of its proper divisors (1).

172716555197 is an equidigital number, since it uses as much as digits as its factorization.

172716555197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4630500, while the sum is 56.

The spelling of 172716555197 in words is "one hundred seventy-two billion, seven hundred sixteen million, five hundred fifty-five thousand, one hundred ninety-seven".