2691209216 has 48 divisors (see below), whose sum is σ = 5431837320. Its totient is φ = 1332920320.

The previous prime is 2691209197. The next prime is 2691209263. The reversal of 2691209216 is 6129021962.

It is a self number, because there is not a number n which added to its sum of digits gives 2691209216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212996 + ... + 225276.

Almost surely, 2^2691209216 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 2691209216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2715918660).

2691209216 is an abundant number, since it is smaller than the sum of its proper divisors (2740628104).

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

2691209216 is a wasteful number, since it uses less digits than its factorization.

2691209216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12410 (or 12390 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 2691209216 is about 51876.8659037918. The cubic root of 2691209216 is about 1390.9637771909.

The spelling of 2691209216 in words is "two billion, six hundred ninety-one million, two hundred nine thousand, two hundred sixteen".