647699560 has 32 divisors (see below), whose sum is σ = 1463443200. Its totient is φ = 257992000.

The previous prime is 647699539. The next prime is 647699561. The reversal of 647699560 is 65996746.

It is a junction number, because it is equal to n+sod(n) for n = 647699498 and 647699507.

It is not an unprimeable number, because it can be changed into a prime (647699561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24316 + ... + 43435.

It is an arithmetic number, because the mean of its divisors is an integer number (45732600).

Almost surely, 2^647699560 is an apocalyptic number.

It is an amenable number.

647699560 is an abundant number, since it is smaller than the sum of its proper divisors (815743640).

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

647699560 is a wasteful number, since it uses less digits than its factorization.

647699560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68001 (or 67997 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 647699560 is about 25449.9422396201. The cubic root of 647699560 is about 865.2159840224.

The spelling of 647699560 in words is "six hundred forty-seven million, six hundred ninety-nine thousand, five hundred sixty".