873552645 has 144 divisors (see below), whose sum is σ = 1920672000. Its totient is φ = 364766976.

The previous prime is 873552637. The next prime is 873552653. The reversal of 873552645 is 546255378.

873552645 is a `hidden beast` number, since 87 + 3 + 5 + 526 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (873552637) and next prime (873552653).

It is not a de Polignac number, because 873552645 - 2³ = 873552637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 873552645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1214596 + ... + 1215314.

It is an arithmetic number, because the mean of its divisors is an integer number (13338000).

Almost surely, 2^873552645 is an apocalyptic number.

It is an amenable number.

873552645 is an abundant number, since it is smaller than the sum of its proper divisors (1047119355).

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

873552645 is a wasteful number, since it uses less digits than its factorization.

873552645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 782 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 873552645 is about 29555.9240254809. The cubic root of 873552645 is about 955.9379307198.

It can be divided in two parts, 87355 and 2645, that added together give a square (90000 = 300²).

The spelling of 873552645 in words is "eight hundred seventy-three million, five hundred fifty-two thousand, six hundred forty-five".