172416321757 has 2 divisors, whose sum is σ = 172416321758. Its totient is φ = 172416321756.

The previous prime is 172416321709. The next prime is 172416321797. The reversal of 172416321757 is 757123614271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97390181476 + 75026140281 = 312074^2 + 273909^2 .

It is a cyclic number.

It is not a de Polignac number, because 172416321757 - 2¹¹ = 172416319709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172416321797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86208160878 + 86208160879.

It is an arithmetic number, because the mean of its divisors is an integer number (86208160879).

Almost surely, 2^172416321757 is an apocalyptic number.

It is an amenable number.

172416321757 is a deficient number, since it is larger than the sum of its proper divisors (1).

172416321757 is an equidigital number, since it uses as much as digits as its factorization.

172416321757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 46.

The spelling of 172416321757 in words is "one hundred seventy-two billion, four hundred sixteen million, three hundred twenty-one thousand, seven hundred fifty-seven".