82155814789 has 8 divisors (see below), whose sum is σ = 83723207040. Its totient is φ = 80589062736.

The previous prime is 82155814759. The next prime is 82155814859. The reversal of 82155814789 is 98741855128.

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 82155814789 - 2⁷ = 82155814661 is a prime.

It is a super-2 number, since 2×82155814789² (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 (82155814759) 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, 103144 + ... + 418270.

It is an arithmetic number, because the mean of its divisors is an integer number (10465400880).

Almost surely, 2^82155814789 is an apocalyptic number.

It is an amenable number.

82155814789 is a deficient number, since it is larger than the sum of its proper divisors (1567392251).

82155814789 is a wasteful number, since it uses less digits than its factorization.

82155814789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320099.

The product of its digits is 6451200, while the sum is 58.

The spelling of 82155814789 in words is "eighty-two billion, one hundred fifty-five million, eight hundred fourteen thousand, seven hundred eighty-nine".