649025756 has 12 divisors (see below), whose sum is σ = 1137767568. Its totient is φ = 323949312.

The previous prime is 649025743. The next prime is 649025801. The reversal of 649025756 is 657520946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138296 + ... + 142911.

It is an arithmetic number, because the mean of its divisors is an integer number (94813964).

Almost surely, 2^649025756 is an apocalyptic number.

It is an amenable number.

649025756 is a deficient number, since it is larger than the sum of its proper divisors (488741812).

649025756 is a wasteful number, since it uses less digits than its factorization.

649025756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281788 (or 281786 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 649025756 is about 25475.9839064166. The cubic root of 649025756 is about 865.8061052182.

The spelling of 649025756 in words is "six hundred forty-nine million, twenty-five thousand, seven hundred fifty-six".