645543160 has 16 divisors (see below), whose sum is σ = 1452472200. Its totient is φ = 258217248.

The previous prime is 645543121. The next prime is 645543203. The reversal of 645543160 is 61345546.

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, 8069250 + ... + 8069329.

Almost surely, 2^645543160 is an apocalyptic number.

It is an amenable number.

645543160 is an abundant number, since it is smaller than the sum of its proper divisors (806929040).

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

645543160 is a wasteful number, since it uses less digits than its factorization.

645543160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138590 (or 16138586 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 645543160 is about 25407.5414001434. The cubic root of 645543160 is about 864.2547224211.

The spelling of 645543160 in words is "six hundred forty-five million, five hundred forty-three thousand, one hundred sixty".