649767530 has 16 divisors (see below), whose sum is σ = 1180313640. Its totient is φ = 257522112.

The previous prime is 649767511. The next prime is 649767581. The reversal of 649767530 is 35767946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 615883489 + 33884041 = 24817^2 + 5821^2 .

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, 296969 + ... + 299148.

Almost surely, 2^649767530 is an apocalyptic number.

649767530 is a deficient number, since it is larger than the sum of its proper divisors (530546110).

649767530 is a wasteful number, since it uses less digits than its factorization.

649767530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596233.

The product of its (nonzero) digits is 952560, while the sum is 47.

The square root of 649767530 is about 25490.5380484603. The cubic root of 649767530 is about 866.1358239991.

The spelling of 649767530 in words is "six hundred forty-nine million, seven hundred sixty-seven thousand, five hundred thirty".