71139604741 has 4 divisors (see below), whose sum is σ = 71343443500. Its totient is φ = 70935765984.

The previous prime is 71139604691. The next prime is 71139604747. The reversal of 71139604741 is 14740693117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14740693117 = 521 ⋅28293077.

It can be written as a sum of positive squares in 2 ways, for example, as 23548437025 + 47591167716 = 153455^2 + 218154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71139604741 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 (71139604747) 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, 101918856 + ... + 101919553.

It is an arithmetic number, because the mean of its divisors is an integer number (17835860875).

Almost surely, 2^71139604741 is an apocalyptic number.

It is an amenable number.

71139604741 is a deficient number, since it is larger than the sum of its proper divisors (203838759).

71139604741 is a wasteful number, since it uses less digits than its factorization.

71139604741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203838758.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 71139604741 in words is "seventy-one billion, one hundred thirty-nine million, six hundred four thousand, seven hundred forty-one".