649508160 has 224 divisors, whose sum is σ = 2481315840. Its totient is φ = 140617728.

The previous prime is 649508143. The next prime is 649508161. The reversal of 649508160 is 61805946.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649508161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125137 + ... + 130223.

Almost surely, 2^649508160 is an apocalyptic number.

649508160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649508160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240657920).

649508160 is an abundant number, since it is smaller than the sum of its proper divisors (1831807680).

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

649508160 is a wasteful number, since it uses less digits than its factorization.

649508160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133 (or 5123 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 649508160 is about 25485.4499665986. The cubic root of 649508160 is about 866.0205624959.

The spelling of 649508160 in words is "six hundred forty-nine million, five hundred eight thousand, one hundred sixty".