647364216 has 64 divisors (see below), whose sum is σ = 1772733600. Its totient is φ = 196087808.

The previous prime is 647364209. The next prime is 647364217. The reversal of 647364216 is 612463746.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647364217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15525 + ... + 39188.

Almost surely, 2^647364216 is an apocalyptic number.

It is an amenable number.

647364216 is an abundant number, since it is smaller than the sum of its proper divisors (1125369384).

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

647364216 is a wasteful number, since it uses less digits than its factorization.

647364216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54768 (or 54764 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 647364216 is about 25443.3530809129. The cubic root of 647364216 is about 865.0666374760.

The spelling of 647364216 in words is "six hundred forty-seven million, three hundred sixty-four thousand, two hundred sixteen".