71556220616 has 32 divisors (see below), whose sum is σ = 143178762240. Its totient is φ = 33408361728.

The previous prime is 71556220609. The next prime is 71556220627. The reversal of 71556220616 is 61602265517.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2054180 + ... + 2088723.

It is an arithmetic number, because the mean of its divisors is an integer number (4474336320).

Almost surely, 2^71556220616 is an apocalyptic number.

It is an amenable number.

71556220616 is an abundant number, since it is smaller than the sum of its proper divisors (71622541624).

71556220616 is a wasteful number, since it uses less digits than its factorization.

71556220616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143053 (or 4143049 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 71556220616 in words is "seventy-one billion, five hundred fifty-six million, two hundred twenty thousand, six hundred sixteen".