71213804872 has 128 divisors (see below), whose sum is σ = 160078233600. Its totient is φ = 29059430400.

The previous prime is 71213804843. The next prime is 71213804881. The reversal of 71213804872 is 27840831217.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48411097 + ... + 48412567.

It is an arithmetic number, because the mean of its divisors is an integer number (1250611200).

Almost surely, 2^71213804872 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 71213804872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80039116800).

71213804872 is an abundant number, since it is smaller than the sum of its proper divisors (88864428728).

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

71213804872 is a wasteful number, since it uses less digits than its factorization.

71213804872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 71213804872 in words is "seventy-one billion, two hundred thirteen million, eight hundred four thousand, eight hundred seventy-two".