71745265505 has 32 divisors (see below), whose sum is σ = 87766778880. Its totient is φ = 56295025920.

The previous prime is 71745265439. The next prime is 71745265507. The reversal of 71745265505 is 50556254717.

It is not a de Polignac number, because 71745265505 - 2¹⁸ = 71745003361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71745265505.

It is not an unprimeable number, because it can be changed into a prime (71745265507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22652432 + ... + 22655598.

It is an arithmetic number, because the mean of its divisors is an integer number (2742711840).

Almost surely, 2^71745265505 is an apocalyptic number.

It is an amenable number.

71745265505 is a deficient number, since it is larger than the sum of its proper divisors (16021513375).

71745265505 is a wasteful number, since it uses less digits than its factorization.

71745265505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 1470000, while the sum is 47.

The spelling of 71745265505 in words is "seventy-one billion, seven hundred forty-five million, two hundred sixty-five thousand, five hundred five".