71857884991068 has 54 divisors (see below), whose sum is σ = 199654724999912. Its totient is φ = 21775116662640.

The previous prime is 71857884991033. The next prime is 71857884991069. The reversal of 71857884991068 is 86019948875817.

71857884991068 is a `hidden beast` number, since 7 + 1 + 8 + 57 + 8 + 8 + 499 + 10 + 68 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71857884991069) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8248145896 + ... + 8248154607.

Almost surely, 2^{71857884991068} is an apocalyptic number.

It is an amenable number.

71857884991068 is an abundant number, since it is smaller than the sum of its proper divisors (127796840008844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71857884991068 is a wasteful number, since it uses less digits than its factorization.

71857884991068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16496300535 (or 16496300519 counting only the distinct ones).

The product of its (nonzero) digits is 1950842880, while the sum is 81.

The spelling of 71857884991068 in words is "seventy-one trillion, eight hundred fifty-seven billion, eight hundred eighty-four million, nine hundred ninety-one thousand, sixty-eight".