647018468 has 6 divisors (see below), whose sum is σ = 1132282326. Its totient is φ = 323509232.

The previous prime is 647018461. The next prime is 647018473. The reversal of 647018468 is 864810746.

647018468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 362826304 + 284192164 = 19048^2 + 16858^2 .

It is not an unprimeable number, because it can be changed into a prime (647018461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80877305 + ... + 80877312.

It is an arithmetic number, because the mean of its divisors is an integer number (188713721).

Almost surely, 2^647018468 is an apocalyptic number.

It is an amenable number.

647018468 is a deficient number, since it is larger than the sum of its proper divisors (485263858).

647018468 is a wasteful number, since it uses less digits than its factorization.

647018468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161754621 (or 161754619 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 647018468 is about 25436.5577073628. The cubic root of 647018468 is about 864.9126034636.

The spelling of 647018468 in words is "six hundred forty-seven million, eighteen thousand, four hundred sixty-eight".