71911859128 has 8 divisors (see below), whose sum is σ = 134834735880. Its totient is φ = 35955929560.

The previous prime is 71911859119. The next prime is 71911859197. The reversal of 71911859128 is 82195811917.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4494491188 + ... + 4494491203.

It is an arithmetic number, because the mean of its divisors is an integer number (16854341985).

Almost surely, 2^71911859128 is an apocalyptic number.

It is an amenable number.

71911859128 is a deficient number, since it is larger than the sum of its proper divisors (62922876752).

71911859128 is a wasteful number, since it uses less digits than its factorization.

71911859128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8988982397 (or 8988982393 counting only the distinct ones).

The product of its digits is 362880, while the sum is 52.

The spelling of 71911859128 in words is "seventy-one billion, nine hundred eleven million, eight hundred fifty-nine thousand, one hundred twenty-eight".