645450996 has 24 divisors (see below), whose sum is σ = 1511497120. Its totient is φ = 214372512.

The previous prime is 645450983. The next prime is 645451007. The reversal of 645450996 is 699054546.

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, 93766 + ... + 100413.

Almost surely, 2^645450996 is an apocalyptic number.

It is an amenable number.

645450996 is an abundant number, since it is smaller than the sum of its proper divisors (866046124).

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

645450996 is a wasteful number, since it uses less digits than its factorization.

645450996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194463 (or 194461 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 645450996 is about 25405.7276219360. The cubic root of 645450996 is about 864.2135906692.

The spelling of 645450996 in words is "six hundred forty-five million, four hundred fifty thousand, nine hundred ninety-six".