2181344264 has 32 divisors (see below), whose sum is σ = 4605776640. Its totient is φ = 959534400.

The previous prime is 2181344251. The next prime is 2181344281. The reversal of 2181344264 is 4624431812.

It is a happy number.

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, 397079 + ... + 402534.

It is an arithmetic number, because the mean of its divisors is an integer number (143930520).

Almost surely, 2^2181344264 is an apocalyptic number.

It is an amenable number.

2181344264 is an abundant number, since it is smaller than the sum of its proper divisors (2424432376).

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

2181344264 is a wasteful number, since it uses less digits than its factorization.

2181344264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799661 (or 799657 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 2181344264 is about 46704.8633870178. The cubic root of 2181344264 is about 1296.9047196627.

The spelling of 2181344264 in words is "two billion, one hundred eighty-one million, three hundred forty-four thousand, two hundred sixty-four".