172344472451 has 2 divisors, whose sum is σ = 172344472452. Its totient is φ = 172344472450.

The previous prime is 172344472429. The next prime is 172344472457. The reversal of 172344472451 is 154274443271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172344472451 - 2¹⁰ = 172344471427 is a prime.

It is not a weakly prime, because it can be changed into another prime (172344472457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86172236225 + 86172236226.

It is an arithmetic number, because the mean of its divisors is an integer number (86172236226).

Almost surely, 2^172344472451 is an apocalyptic number.

172344472451 is a deficient number, since it is larger than the sum of its proper divisors (1).

172344472451 is an equidigital number, since it uses as much as digits as its factorization.

172344472451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 752640, while the sum is 44.

The spelling of 172344472451 in words is "one hundred seventy-two billion, three hundred forty-four million, four hundred seventy-two thousand, four hundred fifty-one".