71300561420520 has 96 divisors (see below), whose sum is σ = 231791322789000. Its totient is φ = 19008190887936.

The previous prime is 71300561420483. The next prime is 71300561420531. The reversal of 71300561420520 is 2502416500317.

71300561420520 is a `hidden beast` number, since 7 + 1 + 3 + 0 + 0 + 561 + 42 + 0 + 52 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33425719124004 + 37874842296516 = 5781498^2 + 6154254^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26268045 + ... + 28855004.

Almost surely, 2^{71300561420520} is an apocalyptic number.

It is an amenable number.

71300561420520 is an abundant number, since it is smaller than the sum of its proper divisors (160490761368480).

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

71300561420520 is a wasteful number, since it uses less digits than its factorization.

71300561420520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55126659 (or 55126652 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Adding to 71300561420520 its reverse (2502416500317), we get a palindrome (73802977920837).

The spelling of 71300561420520 in words is "seventy-one trillion, three hundred billion, five hundred sixty-one million, four hundred twenty thousand, five hundred twenty".