81832114489 has 4 divisors (see below), whose sum is σ = 81833518324. Its totient is φ = 81830710656.

The previous prime is 81832114487. The next prime is 81832114513. The reversal of 81832114489 is 98441123818.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50429439225 + 31402675264 = 224565^2 + 177208^2 .

It is a cyclic number.

It is not a de Polignac number, because 81832114489 - 2¹ = 81832114487 is a prime.

It is a super-2 number, since 2×81832114489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81832114487) 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 3 ways as a sum of consecutive naturals, for example, 610512 + ... + 732385.

It is an arithmetic number, because the mean of its divisors is an integer number (20458379581).

Almost surely, 2^81832114489 is an apocalyptic number.

It is an amenable number.

81832114489 is a deficient number, since it is larger than the sum of its proper divisors (1403835).

81832114489 is a wasteful number, since it uses less digits than its factorization.

81832114489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403834.

The product of its digits is 442368, while the sum is 49.

The spelling of 81832114489 in words is "eighty-one billion, eight hundred thirty-two million, one hundred fourteen thousand, four hundred eighty-nine".