71426520013 has 4 divisors (see below), whose sum is σ = 75185810560. Its totient is φ = 67667229468.

The previous prime is 71426520001. The next prime is 71426520031. The reversal of 71426520013 is 31002562417.

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 71426520013 - 2²⁹ = 70889649101 is a prime.

It is a super-2 number, since 2×71426520013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71426520713) 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 3 ways as a sum of consecutive naturals, for example, 1879645245 + ... + 1879645282.

It is an arithmetic number, because the mean of its divisors is an integer number (18796452640).

Almost surely, 2^71426520013 is an apocalyptic number.

It is an amenable number.

71426520013 is a deficient number, since it is larger than the sum of its proper divisors (3759290547).

71426520013 is a wasteful number, since it uses less digits than its factorization.

71426520013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759290546.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 71426520013 in words is "seventy-one billion, four hundred twenty-six million, five hundred twenty thousand, thirteen".