1604115816 has 32 divisors (see below), whose sum is σ = 4108104000. Its totient is φ = 521663360.

The previous prime is 1604115803. The next prime is 1604115823. The reversal of 1604115816 is 6185114061.

It is a super-2 number, since 2×1604115816² = 5146375102282691712, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814116 + ... + 816083.

It is an arithmetic number, because the mean of its divisors is an integer number (128378250).

Almost surely, 2^1604115816 is an apocalyptic number.

It is an amenable number.

1604115816 is an abundant number, since it is smaller than the sum of its proper divisors (2503988184).

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

1604115816 is a wasteful number, since it uses less digits than its factorization.

1604115816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630249 (or 1630245 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1604115816 is about 40051.4146566635. The cubic root of 1604115816 is about 1170.6091298187.

Adding to 1604115816 its reverse (6185114061), we get a palindrome (7789229877).

The spelling of 1604115816 in words is "one billion, six hundred four million, one hundred fifteen thousand, eight hundred sixteen".