2689544816 has 20 divisors (see below), whose sum is σ = 5955420912. Its totient is φ = 1152662016.

The previous prime is 2689544783. The next prime is 2689544821. The reversal of 2689544816 is 6184459862.

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 3 ways as a sum of consecutive naturals, for example, 12006785 + ... + 12007008.

Almost surely, 2^2689544816 is an apocalyptic number.

It is an amenable number.

2689544816 is an abundant number, since it is smaller than the sum of its proper divisors (3265876096).

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

2689544816 is a wasteful number, since it uses less digits than its factorization.

2689544816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24013808 (or 24013802 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The square root of 2689544816 is about 51860.8215900982. The cubic root of 2689544816 is about 1390.6769671417.

The spelling of 2689544816 in words is "two billion, six hundred eighty-nine million, five hundred forty-four thousand, eight hundred sixteen".