71129110013 has 4 divisors (see below), whose sum is σ = 76600580028. Its totient is φ = 65657640000.

The previous prime is 71129109983. The next prime is 71129110027. The reversal of 71129110013 is 31001192117.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6573479929 + 64555630084 = 81077^2 + 254078^2 .

It is a cyclic number.

It is not a de Polignac number, because 71129110013 - 2¹² = 71129105917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71129110043) 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, 2735734988 + ... + 2735735013.

It is an arithmetic number, because the mean of its divisors is an integer number (19150145007).

Almost surely, 2^71129110013 is an apocalyptic number.

It is an amenable number.

71129110013 is a deficient number, since it is larger than the sum of its proper divisors (5471470015).

71129110013 is a wasteful number, since it uses less digits than its factorization.

71129110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471470014.

The product of its (nonzero) digits is 378, while the sum is 26.

The spelling of 71129110013 in words is "seventy-one billion, one hundred twenty-nine million, one hundred ten thousand, thirteen".