172655344831 has 2 divisors, whose sum is σ = 172655344832. Its totient is φ = 172655344830.

The previous prime is 172655344819. The next prime is 172655344853. The reversal of 172655344831 is 138443556271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172655344831 - 2¹⁹ = 172654820543 is a prime.

It is a super-2 number, since 2×172655344831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172655344331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86327672415 + 86327672416.

It is an arithmetic number, because the mean of its divisors is an integer number (86327672416).

Almost surely, 2^172655344831 is an apocalyptic number.

172655344831 is a deficient number, since it is larger than the sum of its proper divisors (1).

172655344831 is an equidigital number, since it uses as much as digits as its factorization.

172655344831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 49.

The spelling of 172655344831 in words is "one hundred seventy-two billion, six hundred fifty-five million, three hundred forty-four thousand, eight hundred thirty-one".