647463916 has 24 divisors (see below), whose sum is σ = 1262370816. Its totient is φ = 288039120.

The previous prime is 647463881. The next prime is 647463919. The reversal of 647463916 is 619364746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (647463919) 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, 154476 + ... + 158611.

It is an arithmetic number, because the mean of its divisors is an integer number (52598784).

Almost surely, 2^647463916 is an apocalyptic number.

It is an amenable number.

647463916 is a deficient number, since it is larger than the sum of its proper divisors (614906900).

647463916 is a wasteful number, since it uses less digits than its factorization.

647463916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313149 (or 313147 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 647463916 is about 25445.3122598250. The cubic root of 647463916 is about 865.1110445833. Note that the first 3 decimals are identical.

The spelling of 647463916 in words is "six hundred forty-seven million, four hundred sixty-three thousand, nine hundred sixteen".