645453360 has 100 divisors (see below), whose sum is σ = 2241777648. Its totient is φ = 172119168.

The previous prime is 645453353. The next prime is 645453373. The reversal of 645453360 is 63354546.

645453360 is a `hidden beast` number, since 64 + 5 + 4 + 533 + 60 = 666.

It is a super-2 number, since 2×645453360² = 833220079870579200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43324 + ... + 56283.

Almost surely, 2^645453360 is an apocalyptic number.

645453360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

645453360 is an abundant number, since it is smaller than the sum of its proper divisors (1596324288).

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

645453360 is a wasteful number, since it uses less digits than its factorization.

645453360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99632 (or 99617 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 645453360 is about 25405.7741468352. The cubic root of 645453360 is about 864.2146457447.

The spelling of 645453360 in words is "six hundred forty-five million, four hundred fifty-three thousand, three hundred sixty".