71808313250 has 16 divisors (see below), whose sum is σ = 134425162872. Its totient is φ = 28723325200.

The previous prime is 71808313249. The next prime is 71808313267. The reversal of 71808313250 is 5231380817.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27387271081 + 44421042169 = 165491^2 + 210763^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143616377 + ... + 143616876.

Almost surely, 2^71808313250 is an apocalyptic number.

71808313250 is a deficient number, since it is larger than the sum of its proper divisors (62616849622).

71808313250 is a wasteful number, since it uses less digits than its factorization.

71808313250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287233270 (or 287233260 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 71808313250 in words is "seventy-one billion, eight hundred eight million, three hundred thirteen thousand, two hundred fifty".