649273672 has 16 divisors (see below), whose sum is σ = 1256659200. Its totient is φ = 314164560.

The previous prime is 649273661. The next prime is 649273679. The reversal of 649273672 is 276372946.

It is not an unprimeable number, because it can be changed into a prime (649273679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308772 + ... + 1309267.

It is an arithmetic number, because the mean of its divisors is an integer number (78541200).

Almost surely, 2^649273672 is an apocalyptic number.

649273672 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

649273672 is a deficient number, since it is larger than the sum of its proper divisors (607385528).

649273672 is a wasteful number, since it uses less digits than its factorization.

649273672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618076 (or 2618072 counting only the distinct ones).

The product of its digits is 762048, while the sum is 46.

The square root of 649273672 is about 25480.8491224292. The cubic root of 649273672 is about 865.9163318975.

The spelling of 649273672 in words is "six hundred forty-nine million, two hundred seventy-three thousand, six hundred seventy-two".