71351727523 has 4 divisors (see below), whose sum is σ = 71493580368. Its totient is φ = 71209874680.

The previous prime is 71351727509. The next prime is 71351727569. The reversal of 71351727523 is 32572715317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32572715317 = 12823 ⋅2540179.

It is a cyclic number.

It is not a de Polignac number, because 71351727523 - 2⁹ = 71351727011 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 71351727523.

It is not an unprimeable number, because it can be changed into a prime (71351427523) by changing a digit.

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, 70925668 + ... + 70926673.

It is an arithmetic number, because the mean of its divisors is an integer number (17873395092).

Almost surely, 2^71351727523 is an apocalyptic number.

71351727523 is a deficient number, since it is larger than the sum of its proper divisors (141852845).

71351727523 is a wasteful number, since it uses less digits than its factorization.

71351727523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141852844.

The product of its digits is 308700, while the sum is 43.

The spelling of 71351727523 in words is "seventy-one billion, three hundred fifty-one million, seven hundred twenty-seven thousand, five hundred twenty-three".