71544742939 has 2 divisors, whose sum is σ = 71544742940. Its totient is φ = 71544742938.

The previous prime is 71544742823. The next prime is 71544742967. The reversal of 71544742939 is 93924744517.

It is a strong prime.

It is an emirp because it is prime and its reverse (93924744517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71544742939 - 2¹⁷ = 71544611867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71544742939.

It is not a weakly prime, because it can be changed into another prime (71544742739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35772371469 + 35772371470.

It is an arithmetic number, because the mean of its divisors is an integer number (35772371470).

Almost surely, 2^71544742939 is an apocalyptic number.

71544742939 is a deficient number, since it is larger than the sum of its proper divisors (1).

71544742939 is an equidigital number, since it uses as much as digits as its factorization.

71544742939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 55.

The spelling of 71544742939 in words is "seventy-one billion, five hundred forty-four million, seven hundred forty-two thousand, nine hundred thirty-nine".