71242457783 has 4 divisors (see below), whose sum is σ = 81419951760. Its totient is φ = 61064963808.

The previous prime is 71242457773. The next prime is 71242457791. The reversal of 71242457783 is 38775424217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71242457783 - 2⁸ = 71242457527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71242457773) 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, 5088746978 + ... + 5088746991.

It is an arithmetic number, because the mean of its divisors is an integer number (20354987940).

Almost surely, 2^71242457783 is an apocalyptic number.

71242457783 is a deficient number, since it is larger than the sum of its proper divisors (10177493977).

71242457783 is a wasteful number, since it uses less digits than its factorization.

71242457783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10177493976.

The product of its digits is 2634240, while the sum is 50.

The spelling of 71242457783 in words is "seventy-one billion, two hundred forty-two million, four hundred fifty-seven thousand, seven hundred eighty-three".