649045204 has 6 divisors (see below), whose sum is σ = 1135829114. Its totient is φ = 324522600.

The previous prime is 649045169. The next prime is 649045207. The reversal of 649045204 is 402540946.

It can be written as a sum of positive squares in only one way, i.e., 453604804 + 195440400 = 21298^2 + 13980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 649045204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649045207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81130647 + ... + 81130654.

Almost surely, 2^649045204 is an apocalyptic number.

It is an amenable number.

649045204 is a deficient number, since it is larger than the sum of its proper divisors (486783910).

649045204 is a wasteful number, since it uses less digits than its factorization.

649045204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162261305 (or 162261303 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 649045204 is about 25476.3655963719. The cubic root of 649045204 is about 865.8147530665.

The spelling of 649045204 in words is "six hundred forty-nine million, forty-five thousand, two hundred four".