647364564 has 144 divisors (see below), whose sum is σ = 2110792320. Its totient is φ = 162328320.

The previous prime is 647364563. The next prime is 647364583. The reversal of 647364564 is 465463746.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647364563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76362 + ... + 84414.

It is an arithmetic number, because the mean of its divisors is an integer number (14658280).

Almost surely, 2^647364564 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 647364564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055396160).

647364564 is an abundant number, since it is smaller than the sum of its proper divisors (1463427756).

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

647364564 is a wasteful number, since it uses less digits than its factorization.

647364564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8110 (or 8105 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The square root of 647364564 is about 25443.3599196333. The cubic root of 647364564 is about 865.0667924857.

The spelling of 647364564 in words is "six hundred forty-seven million, three hundred sixty-four thousand, five hundred sixty-four".