71775056539 has 2 divisors, whose sum is σ = 71775056540. Its totient is φ = 71775056538.

The previous prime is 71775056489. The next prime is 71775056593. The reversal of 71775056539 is 93565057717.

Together with next prime (71775056593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71775056539 - 2⁷ = 71775056411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71775056539.

It is not a weakly prime, because it can be changed into another prime (71775054539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35887528269 + 35887528270.

It is an arithmetic number, because the mean of its divisors is an integer number (35887528270).

Almost surely, 2^71775056539 is an apocalyptic number.

71775056539 is a deficient number, since it is larger than the sum of its proper divisors (1).

71775056539 is an equidigital number, since it uses as much as digits as its factorization.

71775056539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6945750, while the sum is 55.

The spelling of 71775056539 in words is "seventy-one billion, seven hundred seventy-five million, fifty-six thousand, five hundred thirty-nine".