81445026348 has 72 divisors (see below), whose sum is σ = 235326920192. Its totient is φ = 23265924192.

The previous prime is 81445026331. The next prime is 81445026361. The reversal of 81445026348 is 84362054418.

81445026348 is a `hidden beast` number, since 8 + 1 + 4 + 4 + 5 + 0 + 2 + 634 + 8 = 666.

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 23 ways as a sum of consecutive naturals, for example, 1594461 + ... + 1644747.

Almost surely, 2^81445026348 is an apocalyptic number.

It is an amenable number.

81445026348 is an abundant number, since it is smaller than the sum of its proper divisors (153881893844).

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

81445026348 is a wasteful number, since it uses less digits than its factorization.

81445026348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56731 (or 56726 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 81445026348 in words is "eighty-one billion, four hundred forty-five million, twenty-six thousand, three hundred forty-eight".