649273564 has 12 divisors (see below), whose sum is σ = 1136414664. Its totient is φ = 324583664.

The previous prime is 649273553. The next prime is 649273589. The reversal of 649273564 is 465372946.

It is a congruent number.

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, 29619 + ... + 46645.

It is an arithmetic number, because the mean of its divisors is an integer number (94701222).

Almost surely, 2^649273564 is an apocalyptic number.

It is an amenable number.

649273564 is a deficient number, since it is larger than the sum of its proper divisors (487141100).

649273564 is a wasteful number, since it uses less digits than its factorization.

649273564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26564 (or 26562 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The square root of 649273564 is about 25480.8470031905. The cubic root of 649273564 is about 865.9162838855.

The spelling of 649273564 in words is "six hundred forty-nine million, two hundred seventy-three thousand, five hundred sixty-four".