81414544 has 20 divisors (see below), whose sum is σ = 166043440. Its totient is φ = 38564640.

The previous prime is 81414539. The next prime is 81414559. The reversal of 81414544 is 44541418.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 133602 + ... + 134209.

It is an arithmetic number, because the mean of its divisors is an integer number (8302172).

Almost surely, 2^81414544 is an apocalyptic number.

It is an amenable number.

81414544 is an abundant number, since it is smaller than the sum of its proper divisors (84628896).

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

81414544 is a wasteful number, since it uses less digits than its factorization.

81414544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267838 (or 267832 counting only the distinct ones).

The product of its digits is 10240, while the sum is 31.

The square root of 81414544 is about 9023.0008312091. Note that the first 3 decimals coincide. The cubic root of 81414544 is about 433.4117338751.

The spelling of 81414544 in words is "eighty-one million, four hundred fourteen thousand, five hundred forty-four".