816156417144 has 32 divisors (see below), whose sum is σ = 2083803621120. Its totient is φ = 266263795296.

The previous prime is 816156417143. The next prime is 816156417163. The reversal of 816156417144 is 441714651618.

It is a happy number.

It is a super-2 number, since 2×816156417144² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816156417093 and 816156417102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816156417143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361770334 + ... + 361772589.

It is an arithmetic number, because the mean of its divisors is an integer number (65118863160).

Almost surely, 2^816156417144 is an apocalyptic number.

It is an amenable number.

816156417144 is an abundant number, since it is smaller than the sum of its proper divisors (1267647203976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816156417144 is a wasteful number, since it uses less digits than its factorization.

816156417144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723542979 (or 723542975 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The spelling of 816156417144 in words is "eight hundred sixteen billion, one hundred fifty-six million, four hundred seventeen thousand, one hundred forty-four".