71189446847 has 4 divisors (see below), whose sum is σ = 71562166656. Its totient is φ = 70816727040.

The previous prime is 71189446799. The next prime is 71189446849. The reversal of 71189446847 is 74864498117.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71189446847 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 (71189446849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186359618 + ... + 186359999.

It is an arithmetic number, because the mean of its divisors is an integer number (17890541664).

Almost surely, 2^71189446847 is an apocalyptic number.

71189446847 is a deficient number, since it is larger than the sum of its proper divisors (372719809).

71189446847 is a wasteful number, since it uses less digits than its factorization.

71189446847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372719808.

The product of its digits is 10838016, while the sum is 59.

The spelling of 71189446847 in words is "seventy-one billion, one hundred eighty-nine million, four hundred forty-six thousand, eight hundred forty-seven".