649558160 has 20 divisors (see below), whose sum is σ = 1510222908. Its totient is φ = 259823232.

The previous prime is 649558109. The next prime is 649558163. The reversal of 649558160 is 61855946.

649558160 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 242487184 + 407070976 = 15572^2 + 20176^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (649558163) 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, 4059659 + ... + 4059818.

Almost surely, 2^649558160 is an apocalyptic number.

It is an amenable number.

649558160 is an abundant number, since it is smaller than the sum of its proper divisors (860664748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649558160 is a wasteful number, since it uses less digits than its factorization.

649558160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8119490 (or 8119484 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 649558160 is about 25486.4308995983. The cubic root of 649558160 is about 866.0427843964.

The spelling of 649558160 in words is "six hundred forty-nine million, five hundred fifty-eight thousand, one hundred sixty".