81376122223 has 16 divisors (see below), whose sum is σ = 94558834944. Its totient is φ = 69209676160.

The previous prime is 81376122203. The next prime is 81376122239. The reversal of 81376122223 is 32222167318.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81376122223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81376122203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1271665 + ... + 1334122.

It is an arithmetic number, because the mean of its divisors is an integer number (5909927184).

Almost surely, 2^81376122223 is an apocalyptic number.

81376122223 is a deficient number, since it is larger than the sum of its proper divisors (13182712721).

81376122223 is a wasteful number, since it uses less digits than its factorization.

81376122223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605982.

The product of its digits is 48384, while the sum is 37.

The spelling of 81376122223 in words is "eighty-one billion, three hundred seventy-six million, one hundred twenty-two thousand, two hundred twenty-three".