645092352 has 66 divisors (see below), whose sum is σ = 1862716778. Its totient is φ = 215027712.

The previous prime is 645092323. The next prime is 645092363. The reversal of 645092352 is 253290546.

645092352 is a `hidden beast` number, since 645 + 0 + 9 + 2 + 3 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 618218496 + 26873856 = 24864^2 + 5184^2 .

It is a super-2 number, since 2×645092352² = 832288285217783808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25783 + ... + 44214.

Almost surely, 2^645092352 is an apocalyptic number.

It is an amenable number.

645092352 is an abundant number, since it is smaller than the sum of its proper divisors (1217624426).

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

645092352 is a wasteful number, since it uses less digits than its factorization.

645092352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70023 (or 70002 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 645092352 is about 25398.6683115474. The cubic root of 645092352 is about 864.0534946302.

The spelling of 645092352 in words is "six hundred forty-five million, ninety-two thousand, three hundred fifty-two".