81793182288 has 120 divisors (see below), whose sum is σ = 226685803680. Its totient is φ = 25406105600.

The previous prime is 81793182227. The next prime is 81793182293. The reversal of 81793182288 is 88228139718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1371883 + ... + 1430261.

It is an arithmetic number, because the mean of its divisors is an integer number (1889048364).

Almost surely, 2^81793182288 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 81793182288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113342901840).

81793182288 is an abundant number, since it is smaller than the sum of its proper divisors (144892621392).

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

81793182288 is a wasteful number, since it uses less digits than its factorization.

81793182288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58525 (or 58502 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 57.

The spelling of 81793182288 in words is "eighty-one billion, seven hundred ninety-three million, one hundred eighty-two thousand, two hundred eighty-eight".