172457069089391 has 2 divisors, whose sum is σ = 172457069089392. Its totient is φ = 172457069089390.

The previous prime is 172457069089373. The next prime is 172457069089421. The reversal of 172457069089391 is 193980960754271.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172457069089391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172457069089891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86228534544695 + 86228534544696.

It is an arithmetic number, because the mean of its divisors is an integer number (86228534544696).

It is a 1-persistent number, because it is pandigital, but 2⋅172457069089391 = 344914138178782 is not.

Almost surely, 2^{172457069089391} is an apocalyptic number.

172457069089391 is a deficient number, since it is larger than the sum of its proper divisors (1).

172457069089391 is an equidigital number, since it uses as much as digits as its factorization.

172457069089391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 205752960, while the sum is 71.

The spelling of 172457069089391 in words is "one hundred seventy-two trillion, four hundred fifty-seven billion, sixty-nine million, eighty-nine thousand, three hundred ninety-one".