71816893212 has 12 divisors (see below), whose sum is σ = 167572750856. Its totient is φ = 23938964400.

The previous prime is 71816893207. The next prime is 71816893277. The reversal of 71816893212 is 21239861817.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2992370539 + ... + 2992370562.

Almost surely, 2^71816893212 is an apocalyptic number.

It is an amenable number.

71816893212 is an abundant number, since it is smaller than the sum of its proper divisors (95755857644).

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

71816893212 is a wasteful number, since it uses less digits than its factorization.

71816893212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984741108 (or 5984741106 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The spelling of 71816893212 in words is "seventy-one billion, eight hundred sixteen million, eight hundred ninety-three thousand, two hundred twelve".