81110484 has 216 divisors, whose sum is σ = 268396128. Its totient is φ = 21228480.

The previous prime is 81110479. The next prime is 81110509. The reversal of 81110484 is 48401118.

81110484 is nontrivially palindromic in base 16.

It is a super-2 number, since 2×81110484² = 13157821229428512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 619099 + ... + 619229.

Almost surely, 2^81110484 is an apocalyptic number.

81110484 is a gapful number since it is divisible by the number (84) 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 81110484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134198064).

81110484 is an abundant number, since it is smaller than the sum of its proper divisors (187285644).

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

81110484 is a wasteful number, since it uses less digits than its factorization.

81110484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 81110484 is about 9006.1359083682. The cubic root of 81110484 is about 432.8715045580.

The spelling of 81110484 in words is "eighty-one million, one hundred ten thousand, four hundred eighty-four".