81015450092 has 12 divisors (see below), whose sum is σ = 141792032760. Its totient is φ = 40503440736.

The previous prime is 81015450091. The next prime is 81015450143. The reversal of 81015450092 is 29005451018.

It is not an unprimeable number, because it can be changed into a prime (81015450091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028342 + ... + 1104317.

It is an arithmetic number, because the mean of its divisors is an integer number (11816002730).

Almost surely, 2^81015450092 is an apocalyptic number.

It is an amenable number.

81015450092 is a deficient number, since it is larger than the sum of its proper divisors (60776582668).

81015450092 is a wasteful number, since it uses less digits than its factorization.

81015450092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142160 (or 2142158 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 81015450092 in words is "eighty-one billion, fifteen million, four hundred fifty thousand, ninety-two".