71653329668 has 12 divisors (see below), whose sum is σ = 125510634060. Its totient is φ = 35793148512.

The previous prime is 71653329641. The next prime is 71653329677. The reversal of 71653329668 is 86692335617.

It can be written as a sum of positive squares in 2 ways, for example, as 11612648644 + 60040681024 = 107762^2 + 245032^2 .

It is a super-2 number, since 2×71653329668² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

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, 8374271 + ... + 8382822.

It is an arithmetic number, because the mean of its divisors is an integer number (10459219505).

Almost surely, 2^71653329668 is an apocalyptic number.

It is an amenable number.

71653329668 is a deficient number, since it is larger than the sum of its proper divisors (53857304392).

71653329668 is a wasteful number, since it uses less digits than its factorization.

71653329668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758166 (or 16758164 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 56.

The spelling of 71653329668 in words is "seventy-one billion, six hundred fifty-three million, three hundred twenty-nine thousand, six hundred sixty-eight".