649915500 has 96 divisors (see below), whose sum is σ = 2038196160. Its totient is φ = 159974400.

The previous prime is 649915499. The next prime is 649915517. The reversal of 649915500 is 5519946.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2836 + ... + 36164.

It is an arithmetic number, because the mean of its divisors is an integer number (21231210).

Almost surely, 2^649915500 is an apocalyptic number.

649915500 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 649915500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019098080).

649915500 is an abundant number, since it is smaller than the sum of its proper divisors (1388280660).

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

649915500 is a wasteful number, since it uses less digits than its factorization.

649915500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33364 (or 33352 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 649915500 is about 25493.4403327601. The cubic root of 649915500 is about 866.2015666863.

The spelling of 649915500 in words is "six hundred forty-nine million, nine hundred fifteen thousand, five hundred".