797818816 has 56 divisors (see below), whose sum is σ = 1671066000. Its totient is φ = 376879104.

The previous prime is 797818799. The next prime is 797818829. The reversal of 797818816 is 618818797.

It is a happy 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, 618300 + ... + 619588.

Almost surely, 2^797818816 is an apocalyptic number.

797818816 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 797818816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (835533000).

797818816 is an abundant number, since it is smaller than the sum of its proper divisors (873247184).

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

797818816 is a wasteful number, since it uses less digits than its factorization.

797818816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829 (or 1819 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 55.

The square root of 797818816 is about 28245.6866795622. The cubic root of 797818816 is about 927.4733188587.

The spelling of 797818816 in words is "seven hundred ninety-seven million, eight hundred eighteen thousand, eight hundred sixteen".