647764476 has 48 divisors (see below), whose sum is σ = 1559381376. Its totient is φ = 209127744.

The previous prime is 647764471. The next prime is 647764487. The reversal of 647764476 is 674467746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647764471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97575 + ... + 104001.

It is an arithmetic number, because the mean of its divisors is an integer number (32487112).

Almost surely, 2^647764476 is an apocalyptic number.

It is an amenable number.

647764476 is an abundant number, since it is smaller than the sum of its proper divisors (911616900).

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

647764476 is a wasteful number, since it uses less digits than its factorization.

647764476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6696 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 51.

The square root of 647764476 is about 25451.2175740179. The cubic root of 647764476 is about 865.2448886195.

The spelling of 647764476 in words is "six hundred forty-seven million, seven hundred sixty-four thousand, four hundred seventy-six".