82409450681 has 8 divisors (see below), whose sum is σ = 82713705984. Its totient is φ = 82105721280.

The previous prime is 82409450677. The next prime is 82409450689. The reversal of 82409450681 is 18605490428.

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 82409450681 - 2² = 82409450677 is a prime.

It is a super-2 number, since 2×82409450681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82409450689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183896 + ... + 445686.

It is an arithmetic number, because the mean of its divisors is an integer number (10339213248).

Almost surely, 2^82409450681 is an apocalyptic number.

It is an amenable number.

82409450681 is a deficient number, since it is larger than the sum of its proper divisors (304255303).

82409450681 is a wasteful number, since it uses less digits than its factorization.

82409450681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262951.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 82409450681 in words is "eighty-two billion, four hundred nine million, four hundred fifty thousand, six hundred eighty-one".