71863129134721 has 4 divisors (see below), whose sum is σ = 75645399089200. Its totient is φ = 68080859180244.

The previous prime is 71863129134707. The next prime is 71863129134781. The reversal of 71863129134721 is 12743192136817.

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 71863129134721 - 2⁵ = 71863129134689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71863129134781) 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, 1891134977211 + ... + 1891134977248.

It is an arithmetic number, because the mean of its divisors is an integer number (18911349772300).

Almost surely, 2^{71863129134721} is an apocalyptic number.

It is an amenable number.

71863129134721 is a deficient number, since it is larger than the sum of its proper divisors (3782269954479).

71863129134721 is a wasteful number, since it uses less digits than its factorization.

71863129134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782269954478.

The product of its digits is 3048192, while the sum is 55.

The spelling of 71863129134721 in words is "seventy-one trillion, eight hundred sixty-three billion, one hundred twenty-nine million, one hundred thirty-four thousand, seven hundred twenty-one".