645196384 has 24 divisors (see below), whose sum is σ = 1451692368. Its totient is φ = 276512640.

The previous prime is 645196337. The next prime is 645196403. The reversal of 645196384 is 483691546.

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, 1439947 + ... + 1440394.

It is an arithmetic number, because the mean of its divisors is an integer number (60487182).

Almost surely, 2^645196384 is an apocalyptic number.

It is an amenable number.

645196384 is an abundant number, since it is smaller than the sum of its proper divisors (806495984).

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

645196384 is a wasteful number, since it uses less digits than its factorization.

645196384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2880358 (or 2880350 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 645196384 is about 25400.7162103749. The cubic root of 645196384 is about 864.0999398569.

The spelling of 645196384 in words is "six hundred forty-five million, one hundred ninety-six thousand, three hundred eighty-four".