2889181656 has 64 divisors (see below), whose sum is σ = 8071999200. Its totient is φ = 957481344.

The previous prime is 2889181651. The next prime is 2889181657. The reversal of 2889181656 is 6561819882.

It is a happy number.

2889181656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2889181651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1291 + ... + 76026.

Almost surely, 2^2889181656 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 2889181656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4035999600).

2889181656 is an abundant number, since it is smaller than the sum of its proper divisors (5182817544).

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

2889181656 is a wasteful number, since it uses less digits than its factorization.

2889181656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77505 (or 77495 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 2889181656 is about 53751.1084164783. The cubic root of 2889181656 is about 1424.2676702462.

The spelling of 2889181656 in words is "two billion, eight hundred eighty-nine million, one hundred eighty-one thousand, six hundred fifty-six".