81794372352 has 288 divisors, whose sum is σ = 273570791424. Its totient is φ = 21076070400.

The previous prime is 81794372333. The next prime is 81794372393. The reversal of 81794372352 is 25327349718.

It is a junction number, because it is equal to n+sod(n) for n = 81794372295 and 81794372304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7504827 + ... + 7515717.

Almost surely, 2^81794372352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81794372352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136785395712).

81794372352 is an abundant number, since it is smaller than the sum of its proper divisors (191776419072).

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

81794372352 is a wasteful number, since it uses less digits than its factorization.

81794372352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11055 (or 11041 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The spelling of 81794372352 in words is "eighty-one billion, seven hundred ninety-four million, three hundred seventy-two thousand, three hundred fifty-two".