816485774 has 16 divisors (see below), whose sum is σ = 1334832912. Its totient is φ = 372298368.

The previous prime is 816485773. The next prime is 816485851. The reversal of 816485774 is 477584618.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816485773) 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, 187019 + ... + 191334.

It is an arithmetic number, because the mean of its divisors is an integer number (83427057).

Almost surely, 2^816485774 is an apocalyptic number.

816485774 is a deficient number, since it is larger than the sum of its proper divisors (518347138).

816485774 is a wasteful number, since it uses less digits than its factorization.

816485774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378451.

The product of its digits is 1505280, while the sum is 50.

The square root of 816485774 is about 28574.2151948221. The cubic root of 816485774 is about 934.6511415512.

The spelling of 816485774 in words is "eight hundred sixteen million, four hundred eighty-five thousand, seven hundred seventy-four".