8561791469 has 24 divisors (see below), whose sum is σ = 11158779072. Its totient is φ = 6381429120.

The previous prime is 8561791439. The next prime is 8561791493. The reversal of 8561791469 is 9641971658.

It is not a de Polignac number, because 8561791469 - 2²⁴ = 8545014253 is a prime.

It is a super-2 number, since 2×8561791469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8561791439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64364 + ... + 145829.

It is an arithmetic number, because the mean of its divisors is an integer number (464949128).

Almost surely, 2^8561791469 is an apocalyptic number.

It is an amenable number.

8561791469 is a deficient number, since it is larger than the sum of its proper divisors (2596987603).

8561791469 is a wasteful number, since it uses less digits than its factorization.

8561791469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210257 (or 210234 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 56.

The square root of 8561791469 is about 92529.9490381358. The cubic root of 8561791469 is about 2045.7609384789.

The spelling of 8561791469 in words is "eight billion, five hundred sixty-one million, seven hundred ninety-one thousand, four hundred sixty-nine".