71858139811 has 4 divisors (see below), whose sum is σ = 71859268800. Its totient is φ = 71857010824.

The previous prime is 71858139799. The next prime is 71858139869. The reversal of 71858139811 is 11893185817.

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 71858139811 - 2¹¹ = 71858137763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71858134811) 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, 462931 + ... + 598348.

It is an arithmetic number, because the mean of its divisors is an integer number (17964817200).

Almost surely, 2^71858139811 is an apocalyptic number.

71858139811 is a deficient number, since it is larger than the sum of its proper divisors (1128989).

71858139811 is a wasteful number, since it uses less digits than its factorization.

71858139811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128988.

The product of its digits is 483840, while the sum is 52.

The spelling of 71858139811 in words is "seventy-one billion, eight hundred fifty-eight million, one hundred thirty-nine thousand, eight hundred eleven".