81373227048000 has 448 divisors, whose sum is σ = 308179977431040. Its totient is φ = 20999540736000.

The previous prime is 81373227047977. The next prime is 81373227048019. The reversal of 81373227048000 is 84072237318.

81373227048000 is a `hidden beast` number, since 8 + 1 + 373 + 2 + 270 + 4 + 8 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 63 ways as a sum of consecutive naturals, for example, 619744 + ... + 12772256.

Almost surely, 2^{81373227048000} is an apocalyptic number.

81373227048000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81373227048000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154089988715520).

81373227048000 is an abundant number, since it is smaller than the sum of its proper divisors (226806750383040).

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

81373227048000 is a wasteful number, since it uses less digits than its factorization.

81373227048000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12152580 (or 12152554 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 81373227048000 in words is "eighty-one trillion, three hundred seventy-three billion, two hundred twenty-seven million, forty-eight thousand".