649459172 has 12 divisors (see below), whose sum is σ = 1136983680. Its totient is φ = 324606696.

The previous prime is 649459163. The next prime is 649459183. The reversal of 649459172 is 271954946.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18272 + ... + 40407.

It is an arithmetic number, because the mean of its divisors is an integer number (94748640).

Almost surely, 2^649459172 is an apocalyptic number.

It is an amenable number.

649459172 is a deficient number, since it is larger than the sum of its proper divisors (487524508).

649459172 is a wasteful number, since it uses less digits than its factorization.

649459172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61450 (or 61448 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 649459172 is about 25484.4888510639. The cubic root of 649459172 is about 865.9987892606.

The spelling of 649459172 in words is "six hundred forty-nine million, four hundred fifty-nine thousand, one hundred seventy-two".