8149686399 has 16 divisors (see below), whose sum is σ = 12368089440. Its totient is φ = 5300608320.

The previous prime is 8149686371. The next prime is 8149686409. The reversal of 8149686399 is 9936869418.

It is a happy number.

8149686399 is a `hidden beast` number, since 81 + 4 + 96 + 86 + 399 = 666.

It is not a de Polignac number, because 8149686399 - 2⁸ = 8149686143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8149686319) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3679872 + ... + 3682085.

It is an arithmetic number, because the mean of its divisors is an integer number (773005590).

Almost surely, 2^8149686399 is an apocalyptic number.

8149686399 is a deficient number, since it is larger than the sum of its proper divisors (4218403041).

8149686399 is a wasteful number, since it uses less digits than its factorization.

8149686399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7362007 (or 7362001 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 8149686399 is about 90275.6135343316. The cubic root of 8149686399 is about 2012.3968666668.

The spelling of 8149686399 in words is "eight billion, one hundred forty-nine million, six hundred eighty-six thousand, three hundred ninety-nine".