81108874292 has 12 divisors (see below), whose sum is σ = 141974202720. Its totient is φ = 40544816376.

The previous prime is 81108874283. The next prime is 81108874309. The reversal of 81108874292 is 29247880118.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 81108874292.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386208 + ... + 2419959.

It is an arithmetic number, because the mean of its divisors is an integer number (11831183560).

Almost surely, 2^81108874292 is an apocalyptic number.

It is an amenable number.

81108874292 is a deficient number, since it is larger than the sum of its proper divisors (60865328428).

81108874292 is a wasteful number, since it uses less digits than its factorization.

81108874292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4810390 (or 4810388 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 81108874292 in words is "eighty-one billion, one hundred eight million, eight hundred seventy-four thousand, two hundred ninety-two".