71563520072 has 16 divisors (see below), whose sum is σ = 146379927600. Its totient is φ = 32528872720.

The previous prime is 71563520029. The next prime is 71563520099. The reversal of 71563520072 is 27002536517.

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, 406610822 + ... + 406610997.

It is an arithmetic number, because the mean of its divisors is an integer number (9148745475).

Almost surely, 2^71563520072 is an apocalyptic number.

It is an amenable number.

71563520072 is an abundant number, since it is smaller than the sum of its proper divisors (74816407528).

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

71563520072 is a wasteful number, since it uses less digits than its factorization.

71563520072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813221836 (or 813221832 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 71563520072 in words is "seventy-one billion, five hundred sixty-three million, five hundred twenty thousand, seventy-two".