8561796399 has 12 divisors (see below), whose sum is σ = 13318350136. Its totient is φ = 5268797712.

The previous prime is 8561796379. The next prime is 8561796401. The reversal of 8561796399 is 9936971658.

8561796399 is a `hidden beast` number, since 8 + 5 + 617 + 9 + 6 + 3 + 9 + 9 = 666.

It is not a de Polignac number, because 8561796399 - 2³² = 4266829103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8561796379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36588757 + ... + 36588990.

Almost surely, 2^8561796399 is an apocalyptic number.

8561796399 is a deficient number, since it is larger than the sum of its proper divisors (4756553737).

8561796399 is a wasteful number, since it uses less digits than its factorization.

8561796399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73177766 (or 73177763 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The square root of 8561796399 is about 92529.9756781552. The cubic root of 8561796399 is about 2045.7613311381.

The spelling of 8561796399 in words is "eight billion, five hundred sixty-one million, seven hundred ninety-six thousand, three hundred ninety-nine".