71557596028 has 6 divisors (see below), whose sum is σ = 125225793056. Its totient is φ = 35778798012.

The previous prime is 71557596017. The next prime is 71557596029. The reversal of 71557596028 is 82069575517.

It is a self number, because there is not a number n which added to its sum of digits gives 71557596028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71557596029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8944699500 + ... + 8944699507.

Almost surely, 2^71557596028 is an apocalyptic number.

It is an amenable number.

71557596028 is a deficient number, since it is larger than the sum of its proper divisors (53668197028).

71557596028 is a wasteful number, since it uses less digits than its factorization.

71557596028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17889399011 (or 17889399009 counting only the distinct ones).

The product of its (nonzero) digits is 5292000, while the sum is 55.

The spelling of 71557596028 in words is "seventy-one billion, five hundred fifty-seven million, five hundred ninety-six thousand, twenty-eight".