71718668690 has 16 divisors (see below), whose sum is σ = 129125924928. Its totient is φ = 28680284976.

The previous prime is 71718668663. The next prime is 71718668711. The reversal of 71718668690 is 9686681717.

It is a super-2 number, since 2×71718668690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 855782 + ... + 935841.

It is an arithmetic number, because the mean of its divisors is an integer number (8070370308).

Almost surely, 2^71718668690 is an apocalyptic number.

71718668690 is a deficient number, since it is larger than the sum of its proper divisors (57407256238).

71718668690 is a wasteful number, since it uses less digits than its factorization.

71718668690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795633.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 71718668690 in words is "seventy-one billion, seven hundred eighteen million, six hundred sixty-eight thousand, six hundred ninety".