81410856 has 32 divisors (see below), whose sum is σ = 203863200. Its totient is φ = 27092160.

The previous prime is 81410851. The next prime is 81410887. The reversal of 81410856 is 65801418.

It is not an unprimeable number, because it can be changed into a prime (81410851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14130 + ... + 19038.

It is an arithmetic number, because the mean of its divisors is an integer number (6370725).

Almost surely, 2^81410856 is an apocalyptic number.

It is an amenable number.

81410856 is an abundant number, since it is smaller than the sum of its proper divisors (122452344).

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

81410856 is a wasteful number, since it uses less digits than its factorization.

81410856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609 (or 5605 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 81410856 is about 9022.7964622948. The cubic root of 81410856 is about 433.4051893990.

The spelling of 81410856 in words is "eighty-one million, four hundred ten thousand, eight hundred fifty-six".