81956322254 has 8 divisors (see below), whose sum is σ = 123235057920. Its totient is φ = 40877969616.

The previous prime is 81956322241. The next prime is 81956322263. The reversal of 81956322254 is 45222365918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81956322199 and 81956322208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50094734 + ... + 50096369.

It is an arithmetic number, because the mean of its divisors is an integer number (15404382240).

Almost surely, 2^81956322254 is an apocalyptic number.

81956322254 is a deficient number, since it is larger than the sum of its proper divisors (41278735666).

81956322254 is a wasteful number, since it uses less digits than its factorization.

81956322254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100191514.

The product of its digits is 1036800, while the sum is 47.

The spelling of 81956322254 in words is "eighty-one billion, nine hundred fifty-six million, three hundred twenty-two thousand, two hundred fifty-four".