816162323885 has 8 divisors (see below), whose sum is σ = 982020514200. Its totient is φ = 651179375424.

The previous prime is 816162323831. The next prime is 816162323891. The reversal of 816162323885 is 588323261618.

It can be written as a sum of positive squares in 4 ways, for example, as 99420841 + 816062903044 = 9971^2 + 903362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 816162323885 - 2¹² = 816162319789 is a prime.

It is a super-2 number, since 2×816162323885² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218808410 + ... + 218812139.

It is an arithmetic number, because the mean of its divisors is an integer number (122752564275).

Almost surely, 2^816162323885 is an apocalyptic number.

It is an amenable number.

816162323885 is a deficient number, since it is larger than the sum of its proper divisors (165858190315).

816162323885 is a wasteful number, since it uses less digits than its factorization.

816162323885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437620927.

The product of its digits is 3317760, while the sum is 53.

The spelling of 816162323885 in words is "eight hundred sixteen billion, one hundred sixty-two million, three hundred twenty-three thousand, eight hundred eighty-five".