649586764 has 6 divisors (see below), whose sum is σ = 1136776844. Its totient is φ = 324793380.

The previous prime is 649586761. The next prime is 649586797. The reversal of 649586764 is 467685946.

It is not an unprimeable number, because it can be changed into a prime (649586761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81198342 + ... + 81198349.

Almost surely, 2^649586764 is an apocalyptic number.

It is an amenable number.

649586764 is a deficient number, since it is larger than the sum of its proper divisors (487190080).

649586764 is a wasteful number, since it uses less digits than its factorization.

649586764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162396695 (or 162396693 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 55.

The square root of 649586764 is about 25486.9920547718. The cubic root of 649586764 is about 866.0554965884.

The spelling of 649586764 in words is "six hundred forty-nine million, five hundred eighty-six thousand, seven hundred sixty-four".