829115561 has 8 divisors (see below), whose sum is σ = 834543360. Its totient is φ = 823703472.

The previous prime is 829115537. The next prime is 829115593. The reversal of 829115561 is 165511928.

829115561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 829115561 - 2¹⁴ = 829099177 is a prime.

It is a super-2 number, since 2×829115561² = 1374865226984689442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (829112561) 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, 113075 + ... + 120183.

It is an arithmetic number, because the mean of its divisors is an integer number (104317920).

Almost surely, 2^829115561 is an apocalyptic number.

It is an amenable number.

829115561 is a deficient number, since it is larger than the sum of its proper divisors (5427799).

829115561 is a wasteful number, since it uses less digits than its factorization.

829115561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855.

The product of its digits is 21600, while the sum is 38.

The square root of 829115561 is about 28794.3668275585. The cubic root of 829115561 is about 939.4457125278.

The spelling of 829115561 in words is "eight hundred twenty-nine million, one hundred fifteen thousand, five hundred sixty-one".