71603866580 has 12 divisors (see below), whose sum is σ = 150368119860. Its totient is φ = 28641546624.

The previous prime is 71603866549. The next prime is 71603866591. The reversal of 71603866580 is 8566830617.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55991863876 + 15612002704 = 236626^2 + 124948^2 .

It is a super-2 number, since 2×71603866580² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1790096645 + ... + 1790096684.

It is an arithmetic number, because the mean of its divisors is an integer number (12530676655).

Almost surely, 2^71603866580 is an apocalyptic number.

It is an amenable number.

71603866580 is an abundant number, since it is smaller than the sum of its proper divisors (78764253280).

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

71603866580 is a wasteful number, since it uses less digits than its factorization.

71603866580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580193338 (or 3580193336 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 71603866580 in words is "seventy-one billion, six hundred three million, eight hundred sixty-six thousand, five hundred eighty".