172245677856 has 48 divisors (see below), whose sum is σ = 516737035584. Its totient is φ = 49213050624.

The previous prime is 172245677831. The next prime is 172245677861. The reversal of 172245677856 is 658776542271.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 172245677856.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128158315 + ... + 128159658.

It is an arithmetic number, because the mean of its divisors is an integer number (10765354908).

Almost surely, 2^172245677856 is an apocalyptic number.

172245677856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172245677856 is an abundant number, since it is smaller than the sum of its proper divisors (344491357728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172245677856 is a wasteful number, since it uses less digits than its factorization.

172245677856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256317993 (or 256317985 counting only the distinct ones).

The product of its digits is 39513600, while the sum is 60.

The spelling of 172245677856 in words is "one hundred seventy-two billion, two hundred forty-five million, six hundred seventy-seven thousand, eight hundred fifty-six".