645760372 has 24 divisors (see below), whose sum is σ = 1191139040. Its totient is φ = 305480160.

The previous prime is 645760361. The next prime is 645760417. The reversal of 645760372 is 273067546.

It is a congruent number.

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, 56398 + ... + 66874.

Almost surely, 2^645760372 is an apocalyptic number.

It is an amenable number.

645760372 is a deficient number, since it is larger than the sum of its proper divisors (545378668).

645760372 is a wasteful number, since it uses less digits than its factorization.

645760372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311 (or 11309 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 645760372 is about 25411.8155982606. The cubic root of 645760372 is about 864.3516461989.

The spelling of 645760372 in words is "six hundred forty-five million, seven hundred sixty thousand, three hundred seventy-two".