649049956 has 24 divisors (see below), whose sum is σ = 1199276960. Its totient is φ = 306504000.

The previous prime is 649049941. The next prime is 649049959. The reversal of 649049956 is 659940946.

It is not an unprimeable number, because it can be changed into a prime (649049959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12256 + ... + 38056.

Almost surely, 2^649049956 is an apocalyptic number.

It is an amenable number.

649049956 is a deficient number, since it is larger than the sum of its proper divisors (550227004).

649049956 is a wasteful number, since it uses less digits than its factorization.

649049956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26155 (or 26153 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 52.

The square root of 649049956 is about 25476.4588591115. The cubic root of 649049956 is about 865.8168660892.

The spelling of 649049956 in words is "six hundred forty-nine million, forty-nine thousand, nine hundred fifty-six".