1647647452 has 24 divisors (see below), whose sum is σ = 3198827520. Its totient is φ = 736235760.

The previous prime is 1647647447. The next prime is 1647647461. The reversal of 1647647452 is 2547467461.

It is a congruent number.

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, 314748 + ... + 319939.

It is an arithmetic number, because the mean of its divisors is an integer number (133284480).

Almost surely, 2^1647647452 is an apocalyptic number.

It is an amenable number.

1647647452 is a deficient number, since it is larger than the sum of its proper divisors (1551180068).

1647647452 is a wasteful number, since it uses less digits than its factorization.

1647647452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634761 (or 634759 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 46.

The square root of 1647647452 is about 40591.2238297886. The cubic root of 1647647452 is about 1181.1038822576.

Subtracting 1647647452 from its reverse (2547467461), we obtain a square (899820009 = 29997²).

The spelling of 1647647452 in words is "one billion, six hundred forty-seven million, six hundred forty-seven thousand, four hundred fifty-two".