71689145745 has 16 divisors (see below), whose sum is σ = 131088723840. Its totient is φ = 32772180864.

The previous prime is 71689145729. The next prime is 71689145783. The reversal of 71689145745 is 54754198617.

It is not a de Polignac number, because 71689145745 - 2⁴ = 71689145729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341376780 + ... + 341376989.

It is an arithmetic number, because the mean of its divisors is an integer number (8193045240).

Almost surely, 2^71689145745 is an apocalyptic number.

It is an amenable number.

71689145745 is a deficient number, since it is larger than the sum of its proper divisors (59399578095).

71689145745 is a wasteful number, since it uses less digits than its factorization.

71689145745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682753784.

The product of its digits is 8467200, while the sum is 57.

The spelling of 71689145745 in words is "seventy-one billion, six hundred eighty-nine million, one hundred forty-five thousand, seven hundred forty-five".