172860457589 has 4 divisors (see below), whose sum is σ = 172870962540. Its totient is φ = 172849952640.

The previous prime is 172860457537. The next prime is 172860457591. The reversal of 172860457589 is 985754068271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109729875025 + 63130582564 = 331255^2 + 251258^2 .

It is a cyclic number.

It is not a de Polignac number, because 172860457589 - 2²⁸ = 172592022133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172860457489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5227754 + ... + 5260715.

It is an arithmetic number, because the mean of its divisors is an integer number (43217740635).

Almost surely, 2^172860457589 is an apocalyptic number.

It is an amenable number.

172860457589 is a deficient number, since it is larger than the sum of its proper divisors (10504951).

172860457589 is a wasteful number, since it uses less digits than its factorization.

172860457589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10504950.

The product of its (nonzero) digits is 33868800, while the sum is 62.

The spelling of 172860457589 in words is "one hundred seventy-two billion, eight hundred sixty million, four hundred fifty-seven thousand, five hundred eighty-nine".