172757393239577 has 2 divisors, whose sum is σ = 172757393239578. Its totient is φ = 172757393239576.

The previous prime is 172757393239537. The next prime is 172757393239579. The reversal of 172757393239577 is 775932393757271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172665618172441 + 91775067136 = 13140229^2 + 302944^2 .

It is a cyclic number.

It is not a de Polignac number, because 172757393239577 - 2¹² = 172757393235481 is a prime.

Together with 172757393239579, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172757393239498 and 172757393239507.

It is not a weakly prime, because it can be changed into another prime (172757393239579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86378696619788 + 86378696619789.

It is an arithmetic number, because the mean of its divisors is an integer number (86378696619789).

Almost surely, 2^{172757393239577} is an apocalyptic number.

It is an amenable number.

172757393239577 is a deficient number, since it is larger than the sum of its proper divisors (1).

172757393239577 is an equidigital number, since it uses as much as digits as its factorization.

172757393239577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3675690900, while the sum is 77.

The spelling of 172757393239577 in words is "one hundred seventy-two trillion, seven hundred fifty-seven billion, three hundred ninety-three million, two hundred thirty-nine thousand, five hundred seventy-seven".