71564936500 has 24 divisors (see below), whose sum is σ = 156297822408. Its totient is φ = 28625974400.

The previous prime is 71564936491. The next prime is 71564936503. The reversal of 71564936500 is 563946517.

It can be written as a sum of positive squares in 4 ways, for example, as 495774756 + 71069161744 = 22266^2 + 266588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71564936503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71564437 + ... + 71565436.

It is an arithmetic number, because the mean of its divisors is an integer number (6512409267).

Almost surely, 2^71564936500 is an apocalyptic number.

It is an amenable number.

71564936500 is an abundant number, since it is smaller than the sum of its proper divisors (84732885908).

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

71564936500 is a wasteful number, since it uses less digits than its factorization.

71564936500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143129892 (or 143129880 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 71564936500 in words is "seventy-one billion, five hundred sixty-four million, nine hundred thirty-six thousand, five hundred".