71802811839 has 16 divisors (see below), whose sum is σ = 105911449344. Its totient is φ = 42903940800.

The previous prime is 71802811831. The next prime is 71802811879. The reversal of 71802811839 is 93811820817.

It is a happy number.

It is not a de Polignac number, because 71802811839 - 2³ = 71802811831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71802811831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15320494 + ... + 15325179.

It is an arithmetic number, because the mean of its divisors is an integer number (6619465584).

Almost surely, 2^71802811839 is an apocalyptic number.

71802811839 is a deficient number, since it is larger than the sum of its proper divisors (34108637505).

71802811839 is a wasteful number, since it uses less digits than its factorization.

71802811839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30645758.

The product of its (nonzero) digits is 193536, while the sum is 48.

The spelling of 71802811839 in words is "seventy-one billion, eight hundred two million, eight hundred eleven thousand, eight hundred thirty-nine".