172344472457 has 2 divisors, whose sum is σ = 172344472458. Its totient is φ = 172344472456.

The previous prime is 172344472451. The next prime is 172344472541. The reversal of 172344472457 is 754274443271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108467470336 + 63877002121 = 329344^2 + 252739^2 .

It is a cyclic number.

It is not a de Polignac number, because 172344472457 - 2²² = 172340278153 is a prime.

It is not a weakly prime, because it can be changed into another prime (172344472451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86172236228 + 86172236229.

It is an arithmetic number, because the mean of its divisors is an integer number (86172236229).

Almost surely, 2^172344472457 is an apocalyptic number.

It is an amenable number.

172344472457 is a deficient number, since it is larger than the sum of its proper divisors (1).

172344472457 is an equidigital number, since it uses as much as digits as its factorization.

172344472457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5268480, while the sum is 50.

The spelling of 172344472457 in words is "one hundred seventy-two billion, three hundred forty-four million, four hundred seventy-two thousand, four hundred fifty-seven".