649865529 has 12 divisors (see below), whose sum is σ = 979507776. Its totient is φ = 414406872.

The previous prime is 649865519. The next prime is 649865543. The reversal of 649865529 is 925568946.

It is a happy number.

649865529 is a `hidden beast` number, since 6 + 4 + 9 + 86 + 552 + 9 = 666.

649865529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 649865529 - 2⁵ = 649865497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649865509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1569517 + ... + 1569930.

It is an arithmetic number, because the mean of its divisors is an integer number (81625648).

Almost surely, 2^649865529 is an apocalyptic number.

649865529 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

649865529 is a deficient number, since it is larger than the sum of its proper divisors (329642247).

649865529 is a wasteful number, since it uses less digits than its factorization.

649865529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139476 (or 3139473 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 649865529 is about 25492.4602382744. The cubic root of 649865529 is about 866.1793658166.

It can be divided in two parts, 6498 and 65529, that added together give a palindrome (72027).

The spelling of 649865529 in words is "six hundred forty-nine million, eight hundred sixty-five thousand, five hundred twenty-nine".