647611456 has 14 divisors (see below), whose sum is σ = 1285104110. Its totient is φ = 323805696.

The previous prime is 647611453. The next prime is 647611457. The reversal of 647611456 is 654116746.

It can be written as a sum of positive squares in only one way, i.e., 645973056 + 1638400 = 25416^2 + 1280^2 .

It is not an unprimeable number, because it can be changed into a prime (647611451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5059401 + ... + 5059528.

Almost surely, 2^647611456 is an apocalyptic number.

It is an amenable number.

647611456 is a deficient number, since it is larger than the sum of its proper divisors (637492654).

647611456 is a wasteful number, since it uses less digits than its factorization.

647611456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118941 (or 10118931 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 647611456 is about 25448.2112534457. The cubic root of 647611456 is about 865.1767516116.

The spelling of 647611456 in words is "six hundred forty-seven million, six hundred eleven thousand, four hundred fifty-six".