81411610 has 32 divisors (see below), whose sum is σ = 167984640. Its totient is φ = 27827712.

The previous prime is 81411569. The next prime is 81411619. The reversal of 81411610 is 1611418.

It is not an unprimeable number, because it can be changed into a prime (81411619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24106 + ... + 27274.

It is an arithmetic number, because the mean of its divisors is an integer number (5249520).

Almost surely, 2^81411610 is an apocalyptic number.

81411610 is an abundant number, since it is smaller than the sum of its proper divisors (86573030).

81411610 is a wasteful number, since it uses less digits than its factorization.

81411610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 81411610 is about 9022.8382452530. The cubic root of 81411610 is about 433.4065274126.

Subtracting from 81411610 its product of nonzero digits (192), we obtain a palindrome (81411418).

The spelling of 81411610 in words is "eighty-one million, four hundred eleven thousand, six hundred ten".