816272656 has 40 divisors (see below), whose sum is σ = 1641196544. Its totient is φ = 392878080.

The previous prime is 816272627. The next prime is 816272671. The reversal of 816272656 is 656272618.

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, 91465 + ... + 99991.

Almost surely, 2^816272656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816272656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820598272).

816272656 is an abundant number, since it is smaller than the sum of its proper divisors (824923888).

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

816272656 is a wasteful number, since it uses less digits than its factorization.

816272656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759 (or 8753 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 816272656 is about 28570.4857501583. The cubic root of 816272656 is about 934.5698140206.

The spelling of 816272656 in words is "eight hundred sixteen million, two hundred seventy-two thousand, six hundred fifty-six".