816616316172 has 48 divisors (see below), whose sum is σ = 1967863718912. Its totient is φ = 263296059840.

The previous prime is 816616316143. The next prime is 816616316177. The reversal of 816616316172 is 271613616618.

It is not an unprimeable number, because it can be changed into a prime (816616316177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229083 + ... + 1298349.

Almost surely, 2^816616316172 is an apocalyptic number.

It is an amenable number.

816616316172 is an abundant number, since it is smaller than the sum of its proper divisors (1151247402740).

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

816616316172 is a wasteful number, since it uses less digits than its factorization.

816616316172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071358 (or 1071356 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The spelling of 816616316172 in words is "eight hundred sixteen billion, six hundred sixteen million, three hundred sixteen thousand, one hundred seventy-two".