71797120784 has 20 divisors (see below), whose sum is σ = 139111079580. Its totient is φ = 35897487360.

The previous prime is 71797120777. The next prime is 71797120817. The reversal of 71797120784 is 48702179717.

It can be written as a sum of positive squares in 2 ways, for example, as 63439504384 + 8357616400 = 251872^2 + 91420^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986312 + ... + 1056600.

It is an arithmetic number, because the mean of its divisors is an integer number (6955553979).

Almost surely, 2^71797120784 is an apocalyptic number.

It is an amenable number.

71797120784 is a deficient number, since it is larger than the sum of its proper divisors (67313958796).

71797120784 is a wasteful number, since it uses less digits than its factorization.

71797120784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134138 (or 134132 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 53.

The spelling of 71797120784 in words is "seventy-one billion, seven hundred ninety-seven million, one hundred twenty thousand, seven hundred eighty-four".