647616536 has 96 divisors (see below), whose sum is σ = 1472515200. Its totient is φ = 265950720.

The previous prime is 647616533. The next prime is 647616553. The reversal of 647616536 is 635616746.

It is a hoax number, since the sum of its digits (44) 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 (647616533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1664630 + ... + 1665018.

It is an arithmetic number, because the mean of its divisors is an integer number (15338700).

Almost surely, 2^647616536 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 647616536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736257600).

647616536 is an abundant number, since it is smaller than the sum of its proper divisors (824898664).

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

647616536 is a wasteful number, since it uses less digits than its factorization.

647616536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 566 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 647616536 is about 25448.3110638015. The cubic root of 647616536 is about 865.1790138149.

The spelling of 647616536 in words is "six hundred forty-seven million, six hundred sixteen thousand, five hundred thirty-six".