81088105750 has 64 divisors (see below), whose sum is σ = 153553885056. Its totient is φ = 32061993600.

The previous prime is 81088105723. The next prime is 81088105771. The reversal of 81088105750 is 5750188018.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 81088105697 and 81088105706.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7727007 + ... + 7737493.

It is an arithmetic number, because the mean of its divisors is an integer number (2399279454).

Almost surely, 2^81088105750 is an apocalyptic number.

81088105750 is a deficient number, since it is larger than the sum of its proper divisors (72465779306).

81088105750 is a wasteful number, since it uses less digits than its factorization.

81088105750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858 (or 10848 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 43.

The spelling of 81088105750 in words is "eighty-one billion, eighty-eight million, one hundred five thousand, seven hundred fifty".