2261262564 has 72 divisors (see below), whose sum is σ = 6280616160. Its totient is φ = 680284800.

The previous prime is 2261262551. The next prime is 2261262569. The reversal of 2261262564 is 4652621622.

2261262564 is a `hidden beast` number, since 2 + 26 + 1 + 2 + 625 + 6 + 4 = 666.

It is a super-2 number, since 2×2261262564² = 10226616766695708192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2261262569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34504 + ... + 75584.

It is an arithmetic number, because the mean of its divisors is an integer number (87230780).

Almost surely, 2^2261262564 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 2261262564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3140308080).

2261262564 is an abundant number, since it is smaller than the sum of its proper divisors (4019353596).

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

2261262564 is a wasteful number, since it uses less digits than its factorization.

2261262564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41241 (or 41236 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 2261262564 is about 47552.7345585929. The cubic root of 2261262564 is about 1312.5534493607.

The spelling of 2261262564 in words is "two billion, two hundred sixty-one million, two hundred sixty-two thousand, five hundred sixty-four".