2788455797689 has 9 divisors (see below), whose sum is σ = 2793224725263. Its totient is φ = 2783695006872.

The previous prime is 2788455797671. The next prime is 2788455797741. The reversal of 2788455797689 is 9867975548872.

The square root of 2788455797689 is 1669867.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2766510338089 + 21945459600 = 1663283^2 + 148140^2 .

It is not a de Polignac number, because 2788455797689 - 2⁵ = 2788455797657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2788455797389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1374299527 + ... + 1374301555.

It is an arithmetic number, because the mean of its divisors is an integer number (310358302807).

Almost surely, 2^{2788455797689} is an apocalyptic number.

2788455797689 is the 1669867-th square number.

2788455797689 is the 834934-th centered octagonal number.

It is an amenable number.

2788455797689 is a deficient number, since it is larger than the sum of its proper divisors (4768927574).

2788455797689 is an frugal number, since it uses more digits than its factorization.

2788455797689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5704 (or 2852 counting only the distinct ones).

The product of its digits is 17069875200, while the sum is 85.

The spelling of 2788455797689 in words is "two trillion, seven hundred eighty-eight billion, four hundred fifty-five million, seven hundred ninety-seven thousand, six hundred eighty-nine".