647547216 has 80 divisors (see below), whose sum is σ = 1711765440. Its totient is φ = 210862080.

The previous prime is 647547209. The next prime is 647547217. The reversal of 647547216 is 612745746.

It is a hoax number, since the sum of its digits (42) 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 (647547217) 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, 841680 + ... + 842448.

It is an arithmetic number, because the mean of its divisors is an integer number (21397068).

Almost surely, 2^647547216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647547216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855882720).

647547216 is an abundant number, since it is smaller than the sum of its proper divisors (1064218224).

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

647547216 is a wasteful number, since it uses less digits than its factorization.

647547216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1158 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 647547216 is about 25446.9490509177. The cubic root of 647547216 is about 865.1481435155.

The spelling of 647547216 in words is "six hundred forty-seven million, five hundred forty-seven thousand, two hundred sixteen".