81084508292 has 24 divisors (see below), whose sum is σ = 148358347200. Its totient is φ = 38703337376.

The previous prime is 81084508291. The next prime is 81084508339. The reversal of 81084508292 is 29280548018.

It is not an unprimeable number, because it can be changed into a prime (81084508291) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 818942 + ... + 912597.

It is an arithmetic number, because the mean of its divisors is an integer number (6181597800).

Almost surely, 2^81084508292 is an apocalyptic number.

It is an amenable number.

81084508292 is a deficient number, since it is larger than the sum of its proper divisors (67273838908).

81084508292 is a wasteful number, since it uses less digits than its factorization.

81084508292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732075 (or 1732073 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 81084508292 in words is "eighty-one billion, eighty-four million, five hundred eight thousand, two hundred ninety-two".