81273698054 has 16 divisors (see below), whose sum is σ = 124070916240. Its totient is φ = 39917771520.

The previous prime is 81273698047. The next prime is 81273698123. The reversal of 81273698054 is 45089637218.

It is a junction number, because it is equal to n+sod(n) for n = 81273697987 and 81273698005.

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 7 ways as a sum of consecutive naturals, for example, 104819 + ... + 416574.

It is an arithmetic number, because the mean of its divisors is an integer number (7754432265).

It is a 2-persistent number, because it is pandigital, and so is 2⋅81273698054 = 162547396108, but 3⋅81273698054 = 243821094162 is not.

Almost surely, 2^81273698054 is an apocalyptic number.

81273698054 is a deficient number, since it is larger than the sum of its proper divisors (42797218186).

81273698054 is a wasteful number, since it uses less digits than its factorization.

81273698054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522775.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 81273698054 in words is "eighty-one billion, two hundred seventy-three million, six hundred ninety-eight thousand, fifty-four".