71005279980 has 24 divisors (see below), whose sum is σ = 198814784112. Its totient is φ = 18934741312.

The previous prime is 71005279967. The next prime is 71005279991. The reversal of 71005279980 is 8997250017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591710607 + ... + 591710726.

It is an arithmetic number, because the mean of its divisors is an integer number (8283949338).

Almost surely, 2^71005279980 is an apocalyptic number.

It is an amenable number.

71005279980 is an abundant number, since it is smaller than the sum of its proper divisors (127809504132).

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

71005279980 is a wasteful number, since it uses less digits than its factorization.

71005279980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183421345 (or 1183421343 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 48.

The spelling of 71005279980 in words is "seventy-one billion, five million, two hundred seventy-nine thousand, nine hundred eighty".