8404916985 has 12 divisors (see below), whose sum is σ = 14568522852. Its totient is φ = 4482622368.

The previous prime is 8404916957. The next prime is 8404917043. The reversal of 8404916985 is 5896194048.

It can be written as a sum of positive squares in 2 ways, for example, as 2032567056 + 6372349929 = 45084^2 + 79827^2 .

It is not a de Polignac number, because 8404916985 - 2⁵ = 8404916953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93387922 + ... + 93388011.

It is an arithmetic number, because the mean of its divisors is an integer number (1214043571).

Almost surely, 2^8404916985 is an apocalyptic number.

It is an amenable number.

8404916985 is a deficient number, since it is larger than the sum of its proper divisors (6163605867).

8404916985 is a wasteful number, since it uses less digits than its factorization.

8404916985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186775944 (or 186775941 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 8404916985 is about 91678.3343271462. The cubic root of 8404916985 is about 2033.1892716323.

The spelling of 8404916985 in words is "eight billion, four hundred four million, nine hundred sixteen thousand, nine hundred eighty-five".