81122270459 has 6 divisors (see below), whose sum is σ = 84016050300. Its totient is φ = 78324949976.

The previous prime is 81122270413. The next prime is 81122270473. The reversal of 81122270459 is 95407222118.

It is a de Polignac number, because none of the positive numbers 2^k-81122270459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81121270459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48228809 + ... + 48230490.

It is an arithmetic number, because the mean of its divisors is an integer number (14002675050).

Almost surely, 2^81122270459 is an apocalyptic number.

81122270459 is a deficient number, since it is larger than the sum of its proper divisors (2893779841).

81122270459 is an equidigital number, since it uses as much as digits as its factorization.

81122270459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96459357 (or 96459328 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 81122270459 in words is "eighty-one billion, one hundred twenty-two million, two hundred seventy thousand, four hundred fifty-nine".