172952389565 has 8 divisors (see below), whose sum is σ = 212604888888. Its totient is φ = 134987230720.

The previous prime is 172952389469. The next prime is 172952389567. The reversal of 172952389565 is 565983259271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3844744036 + 169107645529 = 62006^2 + 411227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172952389565 - 2¹⁸ = 172952127421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172952389498 and 172952389507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172952389567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421834892 + ... + 421835301.

It is an arithmetic number, because the mean of its divisors is an integer number (26575611111).

Almost surely, 2^172952389565 is an apocalyptic number.

It is an amenable number.

172952389565 is a deficient number, since it is larger than the sum of its proper divisors (39652499323).

172952389565 is an equidigital number, since it uses as much as digits as its factorization.

172952389565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843670239.

The product of its digits is 40824000, while the sum is 62.

The spelling of 172952389565 in words is "one hundred seventy-two billion, nine hundred fifty-two million, three hundred eighty-nine thousand, five hundred sixty-five".