82121594429 has 8 divisors (see below), whose sum is σ = 95443984320. Its totient is φ = 69196887936.

The previous prime is 82121594419. The next prime is 82121594431. The reversal of 82121594429 is 92449512128.

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 82121594429 - 2²⁰ = 82120545853 is a prime.

It is a super-2 number, since 2×82121594429² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82121594419) 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 7 ways as a sum of consecutive naturals, for example, 99420404 + ... + 99421229.

It is an arithmetic number, because the mean of its divisors is an integer number (11930498040).

Almost surely, 2^82121594429 is an apocalyptic number.

It is an amenable number.

82121594429 is a deficient number, since it is larger than the sum of its proper divisors (13322389891).

82121594429 is a wasteful number, since it uses less digits than its factorization.

82121594429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198841699.

The product of its digits is 414720, while the sum is 47.

The spelling of 82121594429 in words is "eighty-two billion, one hundred twenty-one million, five hundred ninety-four thousand, four hundred twenty-nine".