816825018 has 16 divisors (see below), whose sum is σ = 1636206336. Its totient is φ = 271848960.

The previous prime is 816825007. The next prime is 816825019. The reversal of 816825018 is 810528618.

It is a super-2 number, since 2×816825018² = 1334406220061400648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816825019) 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, 102346 + ... + 110037.

It is an arithmetic number, because the mean of its divisors is an integer number (102262896).

Almost surely, 2^816825018 is an apocalyptic number.

816825018 is an abundant number, since it is smaller than the sum of its proper divisors (819381318).

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

816825018 is a wasteful number, since it uses less digits than its factorization.

816825018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213029.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 816825018 is about 28580.1507693714. The cubic root of 816825018 is about 934.7805705823.

The spelling of 816825018 in words is "eight hundred sixteen million, eight hundred twenty-five thousand, eighteen".