81864407703 has 32 divisors (see below), whose sum is σ = 123903942400. Its totient is φ = 47661716736.

The previous prime is 81864407663. The next prime is 81864407753. The reversal of 81864407703 is 30770446818.

It is not a de Polignac number, because 81864407703 - 2²⁹ = 81327536791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81864407753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472851 + ... + 622347.

It is an arithmetic number, because the mean of its divisors is an integer number (3871998200).

Almost surely, 2^81864407703 is an apocalyptic number.

81864407703 is a deficient number, since it is larger than the sum of its proper divisors (42039534697).

81864407703 is a wasteful number, since it uses less digits than its factorization.

81864407703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150271.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 81864407703 in words is "eighty-one billion, eight hundred sixty-four million, four hundred seven thousand, seven hundred three".