71853235817 has 4 divisors (see below), whose sum is σ = 78385348176. Its totient is φ = 65321123460.

The previous prime is 71853235801. The next prime is 71853235829.

71853235817 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71853235817 - 2⁴ = 71853235801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71853235837) 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 3 ways as a sum of consecutive naturals, for example, 3266056163 + ... + 3266056184.

It is an arithmetic number, because the mean of its divisors is an integer number (19596337044).

Almost surely, 2^71853235817 is an apocalyptic number.

It is an amenable number.

71853235817 is a deficient number, since it is larger than the sum of its proper divisors (6532112359).

71853235817 is a wasteful number, since it uses less digits than its factorization.

71853235817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6532112358.

The product of its digits is 1411200, while the sum is 50.

The spelling of 71853235817 in words is "seventy-one billion, eight hundred fifty-three million, two hundred thirty-five thousand, eight hundred seventeen".