2881161640 has 32 divisors (see below), whose sum is σ = 7408702080. Its totient is φ = 987826752.

The previous prime is 2881161587. The next prime is 2881161659. The reversal of 2881161640 is 461611882.

2881161640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2881161640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5144652 + ... + 5145211.

It is an arithmetic number, because the mean of its divisors is an integer number (231521940).

Almost surely, 2^2881161640 is an apocalyptic number.

2881161640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2881161640 is an abundant number, since it is smaller than the sum of its proper divisors (4527540440).

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

2881161640 is a wasteful number, since it uses less digits than its factorization.

2881161640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10289881 (or 10289877 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2881161640 is about 53676.4533105532. The cubic root of 2881161640 is about 1422.9485844878.

The spelling of 2881161640 in words is "two billion, eight hundred eighty-one million, one hundred sixty-one thousand, six hundred forty".