81410544 has 60 divisors (see below), whose sum is σ = 232157016. Its totient is φ = 26622336.

The previous prime is 81410531. The next prime is 81410587. The reversal of 81410544 is 44501418.

It is a happy number.

81410544 is a `hidden beast` number, since 81 + 41 + 0 + 544 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2299 + ... + 12965.

Almost surely, 2^81410544 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 81410544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116078508).

81410544 is an abundant number, since it is smaller than the sum of its proper divisors (150746472).

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

81410544 is a wasteful number, since it uses less digits than its factorization.

81410544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10734 (or 10725 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 81410544 is about 9022.7791727383. The cubic root of 81410544 is about 433.4046357357.

The spelling of 81410544 in words is "eighty-one million, four hundred ten thousand, five hundred forty-four".