71809872873 has 16 divisors (see below), whose sum is σ = 101384104896. Its totient is φ = 45054748160.

The previous prime is 71809872817. The next prime is 71809872887. The reversal of 71809872873 is 37827890817.

It is a cyclic number.

It is not a de Polignac number, because 71809872873 - 2⁹ = 71809872361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71809872803) 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 15 ways as a sum of consecutive naturals, for example, 1632790 + ... + 1676192.

It is an arithmetic number, because the mean of its divisors is an integer number (6336506556).

Almost surely, 2^71809872873 is an apocalyptic number.

It is an amenable number.

71809872873 is a deficient number, since it is larger than the sum of its proper divisors (29574232023).

71809872873 is a wasteful number, since it uses less digits than its factorization.

71809872873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75864.

The product of its (nonzero) digits is 9483264, while the sum is 60.

The spelling of 71809872873 in words is "seventy-one billion, eight hundred nine million, eight hundred seventy-two thousand, eight hundred seventy-three".