81083986214 has 48 divisors (see below), whose sum is σ = 155246595840. Its totient is φ = 30856376880.

The previous prime is 81083986213. The next prime is 81083986271. The reversal of 81083986214 is 41268938018.

It is a super-2 number, since 2×81083986214² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81083986211) 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 23 ways as a sum of consecutive naturals, for example, 142367 + ... + 427125.

It is an arithmetic number, because the mean of its divisors is an integer number (3234304080).

Almost surely, 2^81083986214 is an apocalyptic number.

81083986214 is a deficient number, since it is larger than the sum of its proper divisors (74162609626).

81083986214 is a wasteful number, since it uses less digits than its factorization.

81083986214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284865 (or 284822 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 81083986214 in words is "eighty-one billion, eighty-three million, nine hundred eighty-six thousand, two hundred fourteen".