647606564 has 36 divisors (see below), whose sum is σ = 1304867088. Its totient is φ = 278866800.

The previous prime is 647606543. The next prime is 647606567. The reversal of 647606564 is 465606746.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (647606567) 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 11 ways as a sum of consecutive naturals, for example, 4502 + ... + 36269.

It is an arithmetic number, because the mean of its divisors is an integer number (36246308).

Almost surely, 2^647606564 is an apocalyptic number.

It is an amenable number.

647606564 is an abundant number, since it is smaller than the sum of its proper divisors (657260524).

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

647606564 is a wasteful number, since it uses less digits than its factorization.

647606564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40824 (or 40803 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 647606564 is about 25448.1151364890. The cubic root of 647606564 is about 865.1745731164.

It can be divided in two parts, 64 and 7606564, that multiplied together give a square (486820096 = 22064²).

The spelling of 647606564 in words is "six hundred forty-seven million, six hundred six thousand, five hundred sixty-four".