71326518433 has 4 divisors (see below), whose sum is σ = 71341330500. Its totient is φ = 71311706368.

The previous prime is 71326518427. The next prime is 71326518443. The reversal of 71326518433 is 33481562317.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26851082769 + 44475435664 = 163863^2 + 210892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71326518433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71326518433.

It is not an unprimeable number, because it can be changed into a prime (71326518413) 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, 7398808 + ... + 7408441.

It is an arithmetic number, because the mean of its divisors is an integer number (17835332625).

Almost surely, 2^71326518433 is an apocalyptic number.

It is an amenable number.

71326518433 is a deficient number, since it is larger than the sum of its proper divisors (14812067).

71326518433 is a wasteful number, since it uses less digits than its factorization.

71326518433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14812066.

The product of its digits is 362880, while the sum is 43.

The spelling of 71326518433 in words is "seventy-one billion, three hundred twenty-six million, five hundred eighteen thousand, four hundred thirty-three".