816445518 has 32 divisors (see below), whose sum is σ = 1894020864. Its totient is φ = 229787712.

The previous prime is 816445517. The next prime is 816445537. The reversal of 816445518 is 815544618.

816445518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 816445518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816445517) 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, 142255 + ... + 147882.

It is an arithmetic number, because the mean of its divisors is an integer number (59188152).

Almost surely, 2^816445518 is an apocalyptic number.

816445518 is an abundant number, since it is smaller than the sum of its proper divisors (1077575346).

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

816445518 is a wasteful number, since it uses less digits than its factorization.

816445518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290216.

The product of its digits is 153600, while the sum is 42.

The square root of 816445518 is about 28573.5107748418. The cubic root of 816445518 is about 934.6357806243.

The spelling of 816445518 in words is "eight hundred sixteen million, four hundred forty-five thousand, five hundred eighteen".