71080071808 has 64 divisors (see below), whose sum is σ = 146167338240. Its totient is φ = 34408192000.

The previous prime is 71080071779. The next prime is 71080071889. The reversal of 71080071808 is 80817008017.

It is a tau number, because it is divible by the number of its divisors (64).

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, 635793 + ... + 739183.

It is an arithmetic number, because the mean of its divisors is an integer number (2283864660).

Almost surely, 2^71080071808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71080071808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73083669120).

71080071808 is an abundant number, since it is smaller than the sum of its proper divisors (75087266432).

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

71080071808 is a wasteful number, since it uses less digits than its factorization.

71080071808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103577 (or 103565 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 40.

The spelling of 71080071808 in words is "seventy-one billion, eighty million, seventy-one thousand, eight hundred eight".