81120308235 has 32 divisors (see below), whose sum is σ = 132694225920. Its totient is φ = 42298867968.

The previous prime is 81120308179. The next prime is 81120308237. The reversal of 81120308235 is 53280302118.

It is not a de Polignac number, because 81120308235 - 2¹⁰ = 81120307211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81120308196 and 81120308205.

It is not an unprimeable number, because it can be changed into a prime (81120308237) by changing a digit.

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, 611496 + ... + 732234.

It is an arithmetic number, because the mean of its divisors is an integer number (4146694560).

Almost surely, 2^81120308235 is an apocalyptic number.

81120308235 is a deficient number, since it is larger than the sum of its proper divisors (51573917685).

81120308235 is a wasteful number, since it uses less digits than its factorization.

81120308235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121747.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 81120308235 in words is "eighty-one billion, one hundred twenty million, three hundred eight thousand, two hundred thirty-five".