8261319394 has 16 divisors (see below), whose sum is σ = 12823658496. Its totient is φ = 3987432000.

The previous prime is 8261319361. The next prime is 8261319431. The reversal of 8261319394 is 4939131628.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141282 + ... + 191005.

It is an arithmetic number, because the mean of its divisors is an integer number (801478656).

Almost surely, 2^8261319394 is an apocalyptic number.

8261319394 is a deficient number, since it is larger than the sum of its proper divisors (4562339102).

8261319394 is a wasteful number, since it uses less digits than its factorization.

8261319394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332721.

The product of its digits is 279936, while the sum is 46.

The square root of 8261319394 is about 90891.8004772708. The cubic root of 8261319394 is about 2021.5437170346.

The spelling of 8261319394 in words is "eight billion, two hundred sixty-one million, three hundred nineteen thousand, three hundred ninety-four".