816023181412 has 12 divisors (see below), whose sum is σ = 1428225099196. Its totient is φ = 407958867360.

The previous prime is 816023181401. The next prime is 816023181431. The reversal of 816023181412 is 214181320618.

It can be written as a sum of positive squares in 2 ways, for example, as 515561336676 + 300461844736 = 718026^2 + 548144^2 .

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, 13146003 + ... + 13207930.

Almost surely, 2^816023181412 is an apocalyptic number.

It is an amenable number.

816023181412 is a deficient number, since it is larger than the sum of its proper divisors (612201917784).

816023181412 is a wasteful number, since it uses less digits than its factorization.

816023181412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26361678 (or 26361676 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 816023181412 in words is "eight hundred sixteen billion, twenty-three million, one hundred eighty-one thousand, four hundred twelve".