2659649984880 has 240 divisors, whose sum is σ = 9592301481984. Its totient is φ = 607838999040.

The previous prime is 2659649984879. The next prime is 2659649984917. The reversal of 2659649984880 is 884899469562.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×2659649984880² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2659649984796 and 2659649984805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166313685 + ... + 166329675.

Almost surely, 2^{2659649984880} is an apocalyptic number.

2659649984880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2659649984880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4796150740992).

2659649984880 is an abundant number, since it is smaller than the sum of its proper divisors (6932651497104).

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

2659649984880 is a wasteful number, since it uses less digits than its factorization.

2659649984880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30164 (or 30151 counting only the distinct ones).

The product of its (nonzero) digits is 2149908480, while the sum is 78.

The spelling of 2659649984880 in words is "two trillion, six hundred fifty-nine billion, six hundred forty-nine million, nine hundred eighty-four thousand, eight hundred eighty".