71748437539 has 4 divisors (see below), whose sum is σ = 71769463056. Its totient is φ = 71727412024.

The previous prime is 71748437477. The next prime is 71748437573. The reversal of 71748437539 is 93573484717.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71748437539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71748437639) 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, 10507639 + ... + 10514464.

It is an arithmetic number, because the mean of its divisors is an integer number (17942365764).

Almost surely, 2^71748437539 is an apocalyptic number.

71748437539 is a deficient number, since it is larger than the sum of its proper divisors (21025517).

71748437539 is a wasteful number, since it uses less digits than its factorization.

71748437539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025516.

The product of its digits is 17781120, while the sum is 58.

The spelling of 71748437539 in words is "seventy-one billion, seven hundred forty-eight million, four hundred thirty-seven thousand, five hundred thirty-nine".