71209265287 has 16 divisors (see below), whose sum is σ = 75659774112. Its totient is φ = 66788075520.

The previous prime is 71209265233. The next prime is 71209265293. The reversal of 71209265287 is 78256290217.

It is a cyclic number.

It is not a de Polignac number, because 71209265287 - 2¹⁵ = 71209232519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71209265287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71209265987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16709737 + ... + 16713997.

It is an arithmetic number, because the mean of its divisors is an integer number (4728735882).

Almost surely, 2^71209265287 is an apocalyptic number.

71209265287 is a deficient number, since it is larger than the sum of its proper divisors (4450508825).

71209265287 is a wasteful number, since it uses less digits than its factorization.

71209265287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 71209265287 in words is "seventy-one billion, two hundred nine million, two hundred sixty-five thousand, two hundred eighty-seven".