81022048910 has 48 divisors (see below), whose sum is σ = 162931196736. Its totient is φ = 28979544000.

The previous prime is 81022048879. The next prime is 81022048927. The reversal of 81022048910 is 1984022018.

It is a Curzon number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 475046 + ... + 622665.

It is an arithmetic number, because the mean of its divisors is an integer number (3394399932).

Almost surely, 2^81022048910 is an apocalyptic number.

81022048910 is an abundant number, since it is smaller than the sum of its proper divisors (81909147826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81022048910 is a wasteful number, since it uses less digits than its factorization.

81022048910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097801 (or 1097790 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 81022048910 in words is "eighty-one billion, twenty-two million, forty-eight thousand, nine hundred ten".