81414468 has 36 divisors (see below), whose sum is σ = 216630960. Its totient is φ = 25709616.

The previous prime is 81414461. The next prime is 81414497. The reversal of 81414468 is 86441418.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (81414461) 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 11 ways as a sum of consecutive naturals, for example, 58830 + ... + 60197.

Almost surely, 2^81414468 is an apocalyptic number.

It is an amenable number.

81414468 is an abundant number, since it is smaller than the sum of its proper divisors (135216492).

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

81414468 is a wasteful number, since it uses less digits than its factorization.

81414468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119056 (or 119051 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 81414468 is about 9022.9966197489. The cubic root of 81414468 is about 433.4115990126.

The spelling of 81414468 in words is "eighty-one million, four hundred fourteen thousand, four hundred sixty-eight".