645170152 has 16 divisors (see below), whose sum is σ = 1319666400. Its totient is φ = 293259120.

The previous prime is 645170143. The next prime is 645170159. The reversal of 645170152 is 251071546.

It is not an unprimeable number, because it can be changed into a prime (645170159) 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, 3665652 + ... + 3665827.

It is an arithmetic number, because the mean of its divisors is an integer number (82479150).

Almost surely, 2^645170152 is an apocalyptic number.

It is an amenable number.

645170152 is an abundant number, since it is smaller than the sum of its proper divisors (674496248).

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

645170152 is a wasteful number, since it uses less digits than its factorization.

645170152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331496 (or 7331492 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 645170152 is about 25400.1998417335. The cubic root of 645170152 is about 864.0882290159.

The spelling of 645170152 in words is "six hundred forty-five million, one hundred seventy thousand, one hundred fifty-two".