71157183728 has 20 divisors (see below), whose sum is σ = 138242714400. Its totient is φ = 35481644544.

The previous prime is 71157183719. The next prime is 71157183743. The reversal of 71157183728 is 82738175117.

It is a super-2 number, since 2×71157183728² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 6053153 + ... + 6064896.

It is an arithmetic number, because the mean of its divisors is an integer number (6912135720).

Almost surely, 2^71157183728 is an apocalyptic number.

It is an amenable number.

71157183728 is a deficient number, since it is larger than the sum of its proper divisors (67085530672).

71157183728 is a wasteful number, since it uses less digits than its factorization.

71157183728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12118424 (or 12118418 counting only the distinct ones).

The product of its digits is 658560, while the sum is 50.

The spelling of 71157183728 in words is "seventy-one billion, one hundred fifty-seven million, one hundred eighty-three thousand, seven hundred twenty-eight".