71020575013 has 8 divisors (see below), whose sum is σ = 71273823768. Its totient is φ = 70767400704.

The previous prime is 71020575007. The next prime is 71020575023. The reversal of 71020575013 is 31057502017.

It can be written as a sum of positive squares in 4 ways, for example, as 61810909924 + 9209665089 = 248618^2 + 95967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71020575013 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 (71020575023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487145 + ... + 2515537.

It is an arithmetic number, because the mean of its divisors is an integer number (8909227971).

Almost surely, 2^71020575013 is an apocalyptic number.

It is an amenable number.

71020575013 is a deficient number, since it is larger than the sum of its proper divisors (253248755).

71020575013 is a wasteful number, since it uses less digits than its factorization.

71020575013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37223.

The product of its (nonzero) digits is 7350, while the sum is 31.

The spelling of 71020575013 in words is "seventy-one billion, twenty million, five hundred seventy-five thousand, thirteen".