71808853216 has 24 divisors (see below), whose sum is σ = 141515541720. Its totient is φ = 35868398208.

The previous prime is 71808853177. The next prime is 71808853231. The reversal of 71808853216 is 61235880817.

It is a super-2 number, since 2×71808853216² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71808853216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093486 + ... + 1157293.

It is an arithmetic number, because the mean of its divisors is an integer number (5896480905).

Almost surely, 2^71808853216 is an apocalyptic number.

It is an amenable number.

71808853216 is a deficient number, since it is larger than the sum of its proper divisors (69706688504).

71808853216 is a wasteful number, since it uses less digits than its factorization.

71808853216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251786 (or 2251778 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 71808853216 in words is "seventy-one billion, eight hundred eight million, eight hundred fifty-three thousand, two hundred sixteen".