649547520 has 288 divisors, whose sum is σ = 2189859840. Its totient is φ = 163921920.

The previous prime is 649547519. The next prime is 649547533. The reversal of 649547520 is 25745946.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10648290 + ... + 10648350.

It is an arithmetic number, because the mean of its divisors is an integer number (7603680).

Almost surely, 2^649547520 is an apocalyptic number.

649547520 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 649547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094929920).

649547520 is an abundant number, since it is smaller than the sum of its proper divisors (1540312320).

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

649547520 is a wasteful number, since it uses less digits than its factorization.

649547520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 649547520 is about 25486.2221602183. Note that the first 3 decimals coincide. The cubic root of 649547520 is about 866.0380556715.

The spelling of 649547520 in words is "six hundred forty-nine million, five hundred forty-seven thousand, five hundred twenty".