2691616256 has 120 divisors (see below), whose sum is σ = 6625062576. Its totient is φ = 1085521920.

The previous prime is 2691616217. The next prime is 2691616309. The reversal of 2691616256 is 6526161962.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423341 + ... + 429651.

Almost surely, 2^2691616256 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 2691616256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312531288).

2691616256 is an abundant number, since it is smaller than the sum of its proper divisors (3933446320).

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

2691616256 is an equidigital number, since it uses as much as digits as its factorization.

2691616256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6337 counting only the distinct ones).

The product of its digits is 233280, while the sum is 44.

The square root of 2691616256 is about 51880.7888914577. The cubic root of 2691616256 is about 1391.0339004835.

The spelling of 2691616256 in words is "two billion, six hundred ninety-one million, six hundred sixteen thousand, two hundred fifty-six".