71710874820 has 72 divisors (see below), whose sum is σ = 234255532056. Its totient is φ = 17651907072.

The previous prime is 71710874813. The next prime is 71710874827. The reversal of 71710874820 is 2847801717.

It is an interprime number because it is at equal distance from previous prime (71710874813) and next prime (71710874827).

It can be written as a sum of positive squares in 4 ways, for example, as 2508206724 + 69202668096 = 50082^2 + 263064^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (71710874827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15320497 + ... + 15325176.

Almost surely, 2^71710874820 is an apocalyptic number.

It is an amenable number.

71710874820 is an abundant number, since it is smaller than the sum of its proper divisors (162544657236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71710874820 is a wasteful number, since it uses less digits than its factorization.

71710874820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30645701 (or 30645696 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 71710874820 in words is "seventy-one billion, seven hundred ten million, eight hundred seventy-four thousand, eight hundred twenty".