650885718980 has 144 divisors (see below), whose sum is σ = 1595569111920. Its totient is φ = 222383895552.

The previous prime is 650885718953. The next prime is 650885719009. The reversal of 650885718980 is 89817588056.

It can be written as a sum of positive squares in 8 ways, for example, as 218492674624 + 432393044356 = 467432^2 + 657566^2 .

It is a super-2 number, since 2×650885718980² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 595503314 + ... + 595504406.

It is an arithmetic number, because the mean of its divisors is an integer number (11080341055).

Almost surely, 2^650885718980 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 650885718980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797784555960).

650885718980 is an abundant number, since it is smaller than the sum of its proper divisors (944683392940).

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

650885718980 is a wasteful number, since it uses less digits than its factorization.

650885718980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 65.

The spelling of 650885718980 in words is "six hundred fifty billion, eight hundred eighty-five million, seven hundred eighteen thousand, nine hundred eighty".