12987826650 has 144 divisors (see below), whose sum is σ = 36108903168. Its totient is φ = 3343392000.

The previous prime is 12987826613. The next prime is 12987826667. The reversal of 12987826650 is 5662878921.

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 71 ways as a sum of consecutive naturals, for example, 7267057 + ... + 7268843.

It is an arithmetic number, because the mean of its divisors is an integer number (250756272).

Almost surely, 2^12987826650 is an apocalyptic number.

12987826650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12987826650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18054451584).

12987826650 is an abundant number, since it is smaller than the sum of its proper divisors (23121076518).

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

12987826650 is a wasteful number, since it uses less digits than its factorization.

12987826650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357 (or 2349 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 12987826650 in words is "twelve billion, nine hundred eighty-seven million, eight hundred twenty-six thousand, six hundred fifty".