2291687568 has 60 divisors (see below), whose sum is σ = 6464094208. Its totient is φ = 757874880.

The previous prime is 2291687549. The next prime is 2291687569. The reversal of 2291687568 is 8657861922.

It is a super-4 number, since 4×2291687568⁴ (a number of 39 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (2291687569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44368 + ... + 80943.

Almost surely, 2^2291687568 is an apocalyptic number.

It is an amenable number.

2291687568 is an abundant number, since it is smaller than the sum of its proper divisors (4172406640).

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

2291687568 is a wasteful number, since it uses less digits than its factorization.

2291687568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125452 (or 125443 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 2291687568 is about 47871.5736946259. The cubic root of 2291687568 is about 1318.4139904541.

The spelling of 2291687568 in words is "two billion, two hundred ninety-one million, six hundred eighty-seven thousand, five hundred sixty-eight".