81116114160 has 160 divisors (see below), whose sum is σ = 257427237888. Its totient is φ = 21121551360.

The previous prime is 81116114119. The next prime is 81116114201. The reversal of 81116114160 is 6141161118.

It is an interprime number because it is at equal distance from previous prime (81116114119) and next prime (81116114201).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2668809 + ... + 2699031.

Almost surely, 2^81116114160 is an apocalyptic number.

81116114160 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 81116114160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128713618944).

81116114160 is an abundant number, since it is smaller than the sum of its proper divisors (176311123728).

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

81116114160 is a wasteful number, since it uses less digits than its factorization.

81116114160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30503 (or 30497 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

Adding to 81116114160 its reverse (6141161118), we get a palindrome (87257275278).

The spelling of 81116114160 in words is "eighty-one billion, one hundred sixteen million, one hundred fourteen thousand, one hundred sixty".