649064465500 has 96 divisors (see below), whose sum is σ = 1551466844928. Its totient is φ = 235254024000.

The previous prime is 649064465459. The next prime is 649064465513. The reversal of 649064465500 is 5564460946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1496299 + ... + 1880701.

It is an arithmetic number, because the mean of its divisors is an integer number (16161112968).

Almost surely, 2^649064465500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649064465500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (775733422464).

649064465500 is an abundant number, since it is smaller than the sum of its proper divisors (902402379428).

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

649064465500 is a wasteful number, since it uses less digits than its factorization.

649064465500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384740 (or 384728 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 49.

It can be divided in two parts, 64906446 and 5500, that added together give a palindrome (64911946).

The spelling of 649064465500 in words is "six hundred forty-nine billion, sixty-four million, four hundred sixty-five thousand, five hundred".