172457069097517 has 2 divisors, whose sum is σ = 172457069097518. Its totient is φ = 172457069097516.

The previous prime is 172457069097493. The next prime is 172457069097583. The reversal of 172457069097517 is 715790960754271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153348446959236 + 19108622138281 = 12383394^2 + 4371341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172457069097517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172457069097917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86228534548758 + 86228534548759.

It is an arithmetic number, because the mean of its divisors is an integer number (86228534548759).

Almost surely, 2^{172457069097517} is an apocalyptic number.

It is an amenable number.

172457069097517 is a deficient number, since it is larger than the sum of its proper divisors (1).

172457069097517 is an equidigital number, since it uses as much as digits as its factorization.

172457069097517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233377200, while the sum is 70.

The spelling of 172457069097517 in words is "one hundred seventy-two trillion, four hundred fifty-seven billion, sixty-nine million, ninety-seven thousand, five hundred seventeen".