81414305543 has 4 divisors (see below), whose sum is σ = 81418769568. Its totient is φ = 81409841520.

The previous prime is 81414305537. The next prime is 81414305587. The reversal of 81414305543 is 34550341418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81414305543 - 2³⁴ = 64234436359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81414305497 and 81414305506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81414305503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2204543 + ... + 2241168.

It is an arithmetic number, because the mean of its divisors is an integer number (20354692392).

Almost surely, 2^81414305543 is an apocalyptic number.

81414305543 is a deficient number, since it is larger than the sum of its proper divisors (4464025).

81414305543 is a wasteful number, since it uses less digits than its factorization.

81414305543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464024.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 81414305543 in words is "eighty-one billion, four hundred fourteen million, three hundred five thousand, five hundred forty-three".