172556875485 has 72 divisors (see below), whose sum is σ = 318158530560. Its totient is φ = 86499088704.

The previous prime is 172556875411. The next prime is 172556875487. The reversal of 172556875485 is 584578655271.

It is a happy number.

172556875485 is a `hidden beast` number, since 1 + 7 + 2 + 5 + 5 + 6 + 87 + 548 + 5 = 666.

It is not a de Polignac number, because 172556875485 - 2¹⁷ = 172556744413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172556875487) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2021296 + ... + 2104934.

It is an arithmetic number, because the mean of its divisors is an integer number (4418868480).

Almost surely, 2^172556875485 is an apocalyptic number.

172556875485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172556875485 is a deficient number, since it is larger than the sum of its proper divisors (145601655075).

172556875485 is a wasteful number, since it uses less digits than its factorization.

172556875485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83815 (or 83793 counting only the distinct ones).

The product of its digits is 94080000, while the sum is 63.

The spelling of 172556875485 in words is "one hundred seventy-two billion, five hundred fifty-six million, eight hundred seventy-five thousand, four hundred eighty-five".