8261398319 has 8 divisors (see below), whose sum is σ = 8750996208. Its totient is φ = 7772204160.

The previous prime is 8261398283. The next prime is 8261398337. The reversal of 8261398319 is 9138931628.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8261398319 - 2³² = 3966431023 is a prime.

It is a super-2 number, since 2×8261398319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261398339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58277 + ... + 141134.

It is an arithmetic number, because the mean of its divisors is an integer number (1093874526).

Almost surely, 2^8261398319 is an apocalyptic number.

8261398319 is a deficient number, since it is larger than the sum of its proper divisors (489597889).

8261398319 is a wasteful number, since it uses less digits than its factorization.

8261398319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201865.

The product of its digits is 559872, while the sum is 50.

The square root of 8261398319 is about 90892.2346463107. The cubic root of 8261398319 is about 2021.5501546596.

The spelling of 8261398319 in words is "eight billion, two hundred sixty-one million, three hundred ninety-eight thousand, three hundred nineteen".