81033583289492 has 24 divisors (see below), whose sum is σ = 144491727744000. Its totient is φ = 39750309963936.

The previous prime is 81033583289459. The next prime is 81033583289497. The reversal of 81033583289492 is 29498238533018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81033583289497) 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, 5483492 + ... + 13861307.

It is an arithmetic number, because the mean of its divisors is an integer number (6020488656000).

Almost surely, 2^{81033583289492} is an apocalyptic number.

It is an amenable number.

81033583289492 is a deficient number, since it is larger than the sum of its proper divisors (63458144454508).

81033583289492 is a wasteful number, since it uses less digits than its factorization.

81033583289492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19364615 (or 19364613 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 65.

The spelling of 81033583289492 in words is "eighty-one trillion, thirty-three billion, five hundred eighty-three million, two hundred eighty-nine thousand, four hundred ninety-two".