71873437817 has 4 divisors (see below), whose sum is σ = 74998369920. Its totient is φ = 68748505716.

The previous prime is 71873437781. The next prime is 71873437829.

71873437817 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 71873437817 - 2²² = 71869243513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71873437847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562466017 + ... + 1562466062.

It is an arithmetic number, because the mean of its divisors is an integer number (18749592480).

Almost surely, 2^71873437817 is an apocalyptic number.

It is an amenable number.

71873437817 is a deficient number, since it is larger than the sum of its proper divisors (3124932103).

71873437817 is a wasteful number, since it uses less digits than its factorization.

71873437817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124932102.

The product of its digits is 5531904, while the sum is 56.

The spelling of 71873437817 in words is "seventy-one billion, eight hundred seventy-three million, four hundred thirty-seven thousand, eight hundred seventeen".