71209868112 has 60 divisors (see below), whose sum is σ = 201052391124. Its totient is φ = 23526558720.

The previous prime is 71209868087. The next prime is 71209868131. The reversal of 71209868112 is 21186890217.

It can be written as a sum of positive squares in 2 ways, for example, as 8891735616 + 62318132496 = 94296^2 + 249636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2171839 + ... + 2204382.

Almost surely, 2^71209868112 is an apocalyptic number.

71209868112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

71209868112 is an abundant number, since it is smaller than the sum of its proper divisors (129842523012).

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

71209868112 is a wasteful number, since it uses less digits than its factorization.

71209868112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376348 (or 4376339 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The spelling of 71209868112 in words is "seventy-one billion, two hundred nine million, eight hundred sixty-eight thousand, one hundred twelve".