81614468 has 24 divisors (see below), whose sum is σ = 159118680. Its totient is φ = 36368640.

The previous prime is 81614461. The next prime is 81614471. The reversal of 81614468 is 86441618.

It can be written as a sum of positive squares in 4 ways, for example, as 2617924 + 78996544 = 1618^2 + 8888^2 .

It is not an unprimeable number, because it can be changed into a prime (81614461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25553 + ... + 28568.

It is an arithmetic number, because the mean of its divisors is an integer number (6629945).

Almost surely, 2^81614468 is an apocalyptic number.

It is an amenable number.

81614468 is a deficient number, since it is larger than the sum of its proper divisors (77504212).

81614468 is a wasteful number, since it uses less digits than its factorization.

81614468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54167 (or 54165 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 81614468 is about 9034.0726142754. The cubic root of 81614468 is about 433.7662101702.

The spelling of 81614468 in words is "eighty-one million, six hundred fourteen thousand, four hundred sixty-eight".