8226772581 has 4 divisors (see below), whose sum is σ = 10969030112. Its totient is φ = 5484515052.

The previous prime is 8226772579. The next prime is 8226772597. The reversal of 8226772581 is 1852776228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8226772581 - 2¹ = 8226772579 is a prime.

It is a super-2 number, since 2×8226772581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8226772581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8226772531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371128761 + ... + 1371128766.

It is an arithmetic number, because the mean of its divisors is an integer number (2742257528).

Almost surely, 2^8226772581 is an apocalyptic number.

It is an amenable number.

8226772581 is a deficient number, since it is larger than the sum of its proper divisors (2742257531).

8226772581 is a wasteful number, since it uses less digits than its factorization.

8226772581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742257530.

The product of its digits is 752640, while the sum is 48.

The square root of 8226772581 is about 90701.5577650131. The cubic root of 8226772581 is about 2018.7219132146.

The spelling of 8226772581 in words is "eight billion, two hundred twenty-six million, seven hundred seventy-two thousand, five hundred eighty-one".