71847987852 has 12 divisors (see below), whose sum is σ = 167645305016. Its totient is φ = 23949329280.

The previous prime is 71847987823. The next prime is 71847987919. The reversal of 71847987852 is 25878974817.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×71847987852² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2993666149 + ... + 2993666172.

Almost surely, 2^71847987852 is an apocalyptic number.

It is an amenable number.

71847987852 is an abundant number, since it is smaller than the sum of its proper divisors (95797317164).

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

71847987852 is a wasteful number, since it uses less digits than its factorization.

71847987852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5987332328 (or 5987332326 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 66.

The spelling of 71847987852 in words is "seventy-one billion, eight hundred forty-seven million, nine hundred eighty-seven thousand, eight hundred fifty-two".