71650818172 has 24 divisors (see below), whose sum is σ = 135352375200. Its totient is φ = 33086133696.

The previous prime is 71650818157. The next prime is 71650818193. The reversal of 71650818172 is 27181805617.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 13425147 + ... + 13430482.

It is an arithmetic number, because the mean of its divisors is an integer number (5639682300).

Almost surely, 2^71650818172 is an apocalyptic number.

It is an amenable number.

71650818172 is a deficient number, since it is larger than the sum of its proper divisors (63701557028).

71650818172 is a wasteful number, since it uses less digits than its factorization.

71650818172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26855685 (or 26855683 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 46.

The spelling of 71650818172 in words is "seventy-one billion, six hundred fifty million, eight hundred eighteen thousand, one hundred seventy-two".