649906160 has 40 divisors (see below), whose sum is σ = 1513214160. Its totient is φ = 259587072.

The previous prime is 649906157. The next prime is 649906163. The reversal of 649906160 is 61609946.

It is an interprime number because it is at equal distance from previous prime (649906157) and next prime (649906163).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649906163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53624 + ... + 64616.

It is an arithmetic number, because the mean of its divisors is an integer number (37830354).

Almost surely, 2^649906160 is an apocalyptic number.

It is an amenable number.

649906160 is an abundant number, since it is smaller than the sum of its proper divisors (863308000).

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

649906160 is a wasteful number, since it uses less digits than its factorization.

649906160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745 (or 11739 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 649906160 is about 25493.2571477244. The cubic root of 649906160 is about 866.1974172436.

The spelling of 649906160 in words is "six hundred forty-nine million, nine hundred six thousand, one hundred sixty".