81143468 has 12 divisors (see below), whose sum is σ = 162286992. Its totient is φ = 34775760.

The previous prime is 81143459. The next prime is 81143611. The reversal of 81143468 is 86434118.

81143468 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1448963 + ... + 1449018.

It is an arithmetic number, because the mean of its divisors is an integer number (13523916).

Almost surely, 2^81143468 is an apocalyptic number.

It is an amenable number.

81143468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81143468 is a wasteful number, since it uses less digits than its factorization.

81143468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897992 (or 2897990 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 81143468 is about 9007.9669182341. The cubic root of 81143468 is about 432.9301730887.

The spelling of 81143468 in words is "eighty-one million, one hundred forty-three thousand, four hundred sixty-eight".