2091284568 has 80 divisors (see below), whose sum is σ = 6112252080. Its totient is φ = 666781632.

The previous prime is 2091284567. The next prime is 2091284633. The reversal of 2091284568 is 8654821902.

2091284568 is a `hidden beast` number, since 2 + 0 + 9 + 1 + 2 + 84 + 568 = 666.

It is a super-2 number, since 2×2091284568² = 8746942288709893248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091284567) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55255 + ... + 85062.

It is an arithmetic number, because the mean of its divisors is an integer number (76403151).

Almost surely, 2^2091284568 is an apocalyptic number.

It is an amenable number.

2091284568 is an abundant number, since it is smaller than the sum of its proper divisors (4020967512).

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

2091284568 is a wasteful number, since it uses less digits than its factorization.

2091284568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140358 (or 140345 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 2091284568 is about 45730.5649210678. The cubic root of 2091284568 is about 1278.8051528916.

The spelling of 2091284568 in words is "two billion, ninety-one million, two hundred eighty-four thousand, five hundred sixty-eight".