71830811845 has 16 divisors (see below), whose sum is σ = 92868540912. Its totient is φ = 53020846080.

The previous prime is 71830811839. The next prime is 71830811851. The reversal of 71830811845 is 54811803817.

It is an interprime number because it is at equal distance from previous prime (71830811839) and next prime (71830811851).

It can be written as a sum of positive squares in 8 ways, for example, as 3086691364 + 68744120481 = 55558^2 + 262191^2 .

It is not a de Polignac number, because 71830811845 - 2¹⁵ = 71830779077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71830811795 and 71830811804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95346 + ... + 390835.

It is an arithmetic number, because the mean of its divisors is an integer number (5804283807).

Almost surely, 2^71830811845 is an apocalyptic number.

It is an amenable number.

71830811845 is a deficient number, since it is larger than the sum of its proper divisors (21037729067).

71830811845 is a wasteful number, since it uses less digits than its factorization.

71830811845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488472.

The product of its (nonzero) digits is 215040, while the sum is 46.

The spelling of 71830811845 in words is "seventy-one billion, eight hundred thirty million, eight hundred eleven thousand, eight hundred forty-five".