71011856518 has 8 divisors (see below), whose sum is σ = 106523312112. Its totient is φ = 35504085816.

The previous prime is 71011856479. The next prime is 71011856521. The reversal of 71011856518 is 81565811017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71011856518² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872530 + ... + 950437.

It is an arithmetic number, because the mean of its divisors is an integer number (13315414014).

Almost surely, 2^71011856518 is an apocalyptic number.

71011856518 is a deficient number, since it is larger than the sum of its proper divisors (35511455594).

71011856518 is a wasteful number, since it uses less digits than its factorization.

71011856518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842446.

The product of its (nonzero) digits is 67200, while the sum is 43.

The spelling of 71011856518 in words is "seventy-one billion, eleven million, eight hundred fifty-six thousand, five hundred eighteen".