71438620866 has 16 divisors (see below), whose sum is σ = 150397096800. Its totient is φ = 22559564448.

The previous prime is 71438620861. The next prime is 71438620901. The reversal of 71438620866 is 66802683417.

It is not an unprimeable number, because it can be changed into a prime (71438620861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313327171 + ... + 313327398.

It is an arithmetic number, because the mean of its divisors is an integer number (9399818550).

Almost surely, 2^71438620866 is an apocalyptic number.

71438620866 is an abundant number, since it is smaller than the sum of its proper divisors (78958475934).

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

71438620866 is a wasteful number, since it uses less digits than its factorization.

71438620866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626654593.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 71438620866 in words is "seventy-one billion, four hundred thirty-eight million, six hundred twenty thousand, eight hundred sixty-six".