81614444 has 24 divisors (see below), whose sum is σ = 147840000. Its totient is φ = 39381840.

The previous prime is 81614417. The next prime is 81614447. The reversal of 81614444 is 44441618.

81614444 = T₃₀₄ + T₃₀₅ + ... + T₈₀₂.

It is a self number, because there is not a number n which added to its sum of digits gives 81614444.

It is not an unprimeable number, because it can be changed into a prime (81614447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61217 + ... + 62535.

It is an arithmetic number, because the mean of its divisors is an integer number (6160000).

Almost surely, 2^81614444 is an apocalyptic number.

It is an amenable number.

81614444 is a deficient number, since it is larger than the sum of its proper divisors (66225556).

81614444 is a wasteful number, since it uses less digits than its factorization.

81614444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1851 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 81614444 is about 9034.0712859707. The cubic root of 81614444 is about 433.7661676517.

The spelling of 81614444 in words is "eighty-one million, six hundred fourteen thousand, four hundred forty-four".