647625768 has 32 divisors (see below), whose sum is σ = 1619943360. Its totient is φ = 215758080.

The previous prime is 647625751. The next prime is 647625809. The reversal of 647625768 is 867526746.

647625768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 647625768.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45621 + ... + 58107.

It is an arithmetic number, because the mean of its divisors is an integer number (50623230).

Almost surely, 2^647625768 is an apocalyptic number.

It is an amenable number.

647625768 is an abundant number, since it is smaller than the sum of its proper divisors (972317592).

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

647625768 is a wasteful number, since it uses less digits than its factorization.

647625768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14657 (or 14653 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The square root of 647625768 is about 25448.4924504380. The cubic root of 647625768 is about 865.1831249384.

The spelling of 647625768 in words is "six hundred forty-seven million, six hundred twenty-five thousand, seven hundred sixty-eight".