818156617816 has 16 divisors (see below), whose sum is σ = 1534180271400. Its totient is φ = 409041878784.

The previous prime is 818156617793. The next prime is 818156617877. The reversal of 818156617816 is 618716651818.

It is a super-2 number, since 2×818156617816² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4458201 + ... + 4638088.

Almost surely, 2^818156617816 is an apocalyptic number.

It is an amenable number.

818156617816 is a deficient number, since it is larger than the sum of its proper divisors (716023653584).

818156617816 is a wasteful number, since it uses less digits than its factorization.

818156617816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9107538 (or 9107534 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 58.

The spelling of 818156617816 in words is "eight hundred eighteen billion, one hundred fifty-six million, six hundred seventeen thousand, eight hundred sixteen".