645150716 has 12 divisors (see below), whose sum is σ = 1290301488. Its totient is φ = 276493152.

The previous prime is 645150707. The next prime is 645150721. The reversal of 645150716 is 617051546.

645150716 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 11520521 + ... + 11520576.

It is an arithmetic number, because the mean of its divisors is an integer number (107525124).

Almost surely, 2^645150716 is an apocalyptic number.

It is an amenable number.

645150716 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

645150716 is a wasteful number, since it uses less digits than its factorization.

645150716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23041108 (or 23041106 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 645150716 is about 25399.8172434370. The cubic root of 645150716 is about 864.0795519315.

The spelling of 645150716 in words is "six hundred forty-five million, one hundred fifty thousand, seven hundred sixteen".