2659987512 has 320 divisors, whose sum is σ = 9302092800. Its totient is φ = 691441920.

The previous prime is 2659987507. The next prime is 2659987529. The reversal of 2659987512 is 2157899562.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (2721600) is a multiple of the sum of its prime divisors (675).

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 79 ways as a sum of consecutive naturals, for example, 4658187 + ... + 4658757.

It is an arithmetic number, because the mean of its divisors is an integer number (29069040).

Almost surely, 2^2659987512 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 2659987512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4651046400).

2659987512 is an abundant number, since it is smaller than the sum of its proper divisors (6642105288).

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

2659987512 is a wasteful number, since it uses less digits than its factorization.

2659987512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 675 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 2659987512 is about 51575.0667668012. The cubic root of 2659987512 is about 1385.5638139432.

The spelling of 2659987512 in words is "two billion, six hundred fifty-nine million, nine hundred eighty-seven thousand, five hundred twelve".