647640316 has 12 divisors (see below), whose sum is σ = 1133914432. Its totient is φ = 323664768.

The previous prime is 647640299. The next prime is 647640319. The reversal of 647640316 is 613046746.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647640319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29205 + ... + 46348.

Almost surely, 2^647640316 is an apocalyptic number.

It is an amenable number.

647640316 is a deficient number, since it is larger than the sum of its proper divisors (486274116).

647640316 is a wasteful number, since it uses less digits than its factorization.

647640316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77700 (or 77698 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 647640316 is about 25448.7782810885. The cubic root of 647640316 is about 865.1896032631.

The spelling of 647640316 in words is "six hundred forty-seven million, six hundred forty thousand, three hundred sixteen".