71280764709 has 48 divisors (see below), whose sum is σ = 124581359616. Its totient is φ = 35418984480.

The previous prime is 71280764707. The next prime is 71280764749. The reversal of 71280764709 is 90746708217.

It is not a de Polignac number, because 71280764709 - 2¹ = 71280764707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71280764707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 551389 + ... + 668274.

It is an arithmetic number, because the mean of its divisors is an integer number (2595444992).

Almost surely, 2^71280764709 is an apocalyptic number.

It is an amenable number.

71280764709 is a deficient number, since it is larger than the sum of its proper divisors (53300594907).

71280764709 is a wasteful number, since it uses less digits than its factorization.

71280764709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219718 (or 1219707 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 71280764709 in words is "seventy-one billion, two hundred eighty million, seven hundred sixty-four thousand, seven hundred nine".