81071426300 has 144 divisors (see below), whose sum is σ = 184228208640. Its totient is φ = 30931200000.

The previous prime is 81071426297. The next prime is 81071426321. The reversal of 81071426300 is 362417018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107950925 + ... + 107951675.

It is an arithmetic number, because the mean of its divisors is an integer number (1279362560).

Almost surely, 2^81071426300 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 81071426300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92114104320).

81071426300 is an abundant number, since it is smaller than the sum of its proper divisors (103156782340).

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

81071426300 is a wasteful number, since it uses less digits than its factorization.

81071426300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 81071426300 in words is "eighty-one billion, seventy-one million, four hundred twenty-six thousand, three hundred".