645022652 has 12 divisors (see below), whose sum is σ = 1129023840. Its totient is φ = 322444416.

The previous prime is 645022627. The next prime is 645022681. The reversal of 645022652 is 256220546.

645022652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×645022652² = 832108443186226208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548 + ... + 37164.

It is an arithmetic number, because the mean of its divisors is an integer number (94085320).

Almost surely, 2^645022652 is an apocalyptic number.

It is an amenable number.

645022652 is a deficient number, since it is larger than the sum of its proper divisors (484001188).

645022652 is a wasteful number, since it uses less digits than its factorization.

645022652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33460 (or 33458 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 645022652 is about 25397.2961552997. The cubic root of 645022652 is about 864.0223741777.

The spelling of 645022652 in words is "six hundred forty-five million, twenty-two thousand, six hundred fifty-two".