81084546992 has 20 divisors (see below), whose sum is σ = 157331347560. Its totient is φ = 40482908928.

The previous prime is 81084546967. The next prime is 81084547013. The reversal of 81084546992 is 29964548018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699017 + ... + 3720872.

It is an arithmetic number, because the mean of its divisors is an integer number (7866567378).

Almost surely, 2^81084546992 is an apocalyptic number.

It is an amenable number.

81084546992 is a deficient number, since it is larger than the sum of its proper divisors (76246800568).

81084546992 is a wasteful number, since it uses less digits than its factorization.

81084546992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420580 (or 7420574 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 81084546992 in words is "eighty-one billion, eighty-four million, five hundred forty-six thousand, nine hundred ninety-two".