71580072944 has 10 divisors (see below), whose sum is σ = 138686391360. Its totient is φ = 35790036464.

The previous prime is 71580072923. The next prime is 71580072961. The reversal of 71580072944 is 44927008517.

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, 2236877264 + ... + 2236877295.

It is an arithmetic number, because the mean of its divisors is an integer number (13868639136).

Almost surely, 2^71580072944 is an apocalyptic number.

It is an amenable number.

71580072944 is a deficient number, since it is larger than the sum of its proper divisors (67106318416).

71580072944 is a wasteful number, since it uses less digits than its factorization.

71580072944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473754567 (or 4473754561 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 71580072944 in words is "seventy-one billion, five hundred eighty million, seventy-two thousand, nine hundred forty-four".