647027064 has 96 divisors (see below), whose sum is σ = 1868256000. Its totient is φ = 201704256.

The previous prime is 647027011. The next prime is 647027131. The reversal of 647027064 is 460720746.

647027064 is a `hidden beast` number, since 647 + 0 + 2 + 7 + 0 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105079 + ... + 111065.

It is an arithmetic number, because the mean of its divisors is an integer number (19461000).

Almost surely, 2^647027064 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 647027064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934128000).

647027064 is an abundant number, since it is smaller than the sum of its proper divisors (1221228936).

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

647027064 is a wasteful number, since it uses less digits than its factorization.

647027064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6097 (or 6090 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 647027064 is about 25436.7266762058. The cubic root of 647027064 is about 864.9164337282.

The spelling of 647027064 in words is "six hundred forty-seven million, twenty-seven thousand, sixty-four".