8326138261 has 6 divisors (see below), whose sum is σ = 9685507830. Its totient is φ = 7136689896.

The previous prime is 8326138241. The next prime is 8326138283. The reversal of 8326138261 is 1628316238.

It can be written as a sum of positive squares in only one way, i.e., 5240891236 + 3085247025 = 72394^2 + 55545^2 .

It is not a de Polignac number, because 8326138261 - 2⁷ = 8326138133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8326138241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84960546 + ... + 84960643.

It is an arithmetic number, because the mean of its divisors is an integer number (1614251305).

Almost surely, 2^8326138261 is an apocalyptic number.

It is an amenable number.

8326138261 is a deficient number, since it is larger than the sum of its proper divisors (1359369569).

8326138261 is a wasteful number, since it uses less digits than its factorization.

8326138261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169921203 (or 169921196 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 8326138261 is about 91247.6753731294. The cubic root of 8326138261 is about 2026.8170054025.

The spelling of 8326138261 in words is "eight billion, three hundred twenty-six million, one hundred thirty-eight thousand, two hundred sixty-one".