81360912 has 40 divisors (see below), whose sum is σ = 222548256. Its totient is φ = 25524736.

The previous prime is 81360911. The next prime is 81360919. The reversal of 81360912 is 21906318.

It is a self number, because there is not a number n which added to its sum of digits gives 81360912.

It is not an unprimeable number, because it can be changed into a prime (81360911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49038 + ... + 50669.

Almost surely, 2^81360912 is an apocalyptic number.

It is an amenable number.

81360912 is an abundant number, since it is smaller than the sum of its proper divisors (141187344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81360912 is a wasteful number, since it uses less digits than its factorization.

81360912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99735 (or 99729 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 81360912 is about 9020.0283813301. The cubic root of 81360912 is about 433.3165426762.

The spelling of 81360912 in words is "eighty-one million, three hundred sixty thousand, nine hundred twelve".