649630858752 has 160 divisors (see below), whose sum is σ = 1930623932160. Its totient is φ = 215679744000.

The previous prime is 649630858741. The next prime is 649630858769. The reversal of 649630858752 is 257858036946.

It is a happy number.

649630858752 is a `hidden beast` number, since 6 + 49 + 6 + 3 + 0 + 8 + 587 + 5 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 649630858752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3376213 + ... + 3563435.

It is an arithmetic number, because the mean of its divisors is an integer number (12066399576).

Almost surely, 2^649630858752 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 649630858752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965311966080).

649630858752 is an abundant number, since it is smaller than the sum of its proper divisors (1280993073408).

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

649630858752 is a wasteful number, since it uses less digits than its factorization.

649630858752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187501 (or 187479 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 649630858752 in words is "six hundred forty-nine billion, six hundred thirty million, eight hundred fifty-eight thousand, seven hundred fifty-two".