71729347345 has 4 divisors (see below), whose sum is σ = 86075216820. Its totient is φ = 57383477872.

The previous prime is 71729347337. The next prime is 71729347457. The reversal of 71729347345 is 54374392717.

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 38428937089 + 33300410256 = 196033^2 + 182484^2 .

It is a cyclic number.

It is not a de Polignac number, because 71729347345 - 2³ = 71729347337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71729347292 and 71729347301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7172934730 + ... + 7172934739.

It is an arithmetic number, because the mean of its divisors is an integer number (21518804205).

Almost surely, 2^71729347345 is an apocalyptic number.

It is an amenable number.

71729347345 is a deficient number, since it is larger than the sum of its proper divisors (14345869475).

71729347345 is a wasteful number, since it uses less digits than its factorization.

71729347345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14345869474.

The product of its digits is 4445280, while the sum is 52.

The spelling of 71729347345 in words is "seventy-one billion, seven hundred twenty-nine million, three hundred forty-seven thousand, three hundred forty-five".