818674641 has 16 divisors (see below), whose sum is σ = 1276686400. Its totient is φ = 517057344.

The previous prime is 818674621. The next prime is 818674643. The reversal of 818674641 is 146476818.

818674641 is a `hidden beast` number, since 8 + 186 + 7 + 464 + 1 = 666.

It is not a de Polignac number, because 818674641 - 2⁵ = 818674609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818674643) 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, 797416 + ... + 798441.

It is an arithmetic number, because the mean of its divisors is an integer number (79792900).

Almost surely, 2^818674641 is an apocalyptic number.

It is an amenable number.

818674641 is a deficient number, since it is larger than the sum of its proper divisors (458011759).

818674641 is a wasteful number, since it uses less digits than its factorization.

818674641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595885 (or 1595879 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 818674641 is about 28612.4909960667. The cubic root of 818674641 is about 935.4856127470.

Adding to 818674641 its product of digits (258048), we get a square (818932689 = 28617²).

The spelling of 818674641 in words is "eight hundred eighteen million, six hundred seventy-four thousand, six hundred forty-one".