71317905747 has 16 divisors (see below), whose sum is σ = 103777819392. Its totient is φ = 43205188320.

The previous prime is 71317905727. The next prime is 71317905761. The reversal of 71317905747 is 74750971317.

It is a happy number.

It is not a de Polignac number, because 71317905747 - 2¹² = 71317901651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71317905747.

It is not an unprimeable number, because it can be changed into a prime (71317905727) 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, 362983 + ... + 523824.

It is an arithmetic number, because the mean of its divisors is an integer number (6486113712).

Almost surely, 2^71317905747 is an apocalyptic number.

71317905747 is a deficient number, since it is larger than the sum of its proper divisors (32459913645).

71317905747 is a wasteful number, since it uses less digits than its factorization.

71317905747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889258.

The product of its (nonzero) digits is 1296540, while the sum is 51.

The spelling of 71317905747 in words is "seventy-one billion, three hundred seventeen million, nine hundred five thousand, seven hundred forty-seven".