81810071360 has 112 divisors (see below), whose sum is σ = 201386675712. Its totient is φ = 31622400000.

The previous prime is 81810071327. The next prime is 81810071377. The reversal of 81810071360 is 6317001818.

It is a self number, because there is not a number n which added to its sum of digits gives 81810071360.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7265735 + ... + 7276985.

Almost surely, 2^81810071360 is an apocalyptic number.

81810071360 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 81810071360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100693337856).

81810071360 is an abundant number, since it is smaller than the sum of its proper divisors (119576604352).

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

81810071360 is a wasteful number, since it uses less digits than its factorization.

81810071360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12032 (or 12022 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 81810071360 in words is "eighty-one billion, eight hundred ten million, seventy-one thousand, three hundred sixty".