81073592944 has 20 divisors (see below), whose sum is σ = 162496641960. Its totient is φ = 39138975680.

The previous prime is 81073592923. The next prime is 81073592981. The reversal of 81073592944 is 44929537018.

It is a junction number, because it is equal to n+sod(n) for n = 81073592891 and 81073592900.

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 3 ways as a sum of consecutive naturals, for example, 87363322 + ... + 87364249.

It is an arithmetic number, because the mean of its divisors is an integer number (8124832098).

Almost surely, 2^81073592944 is an apocalyptic number.

It is an amenable number.

81073592944 is an abundant number, since it is smaller than the sum of its proper divisors (81423049016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81073592944 is a wasteful number, since it uses less digits than its factorization.

81073592944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174727608 (or 174727602 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 81073592944 in words is "eighty-one billion, seventy-three million, five hundred ninety-two thousand, nine hundred forty-four".