1616445885 has 16 divisors (see below), whose sum is σ = 2587170240. Its totient is φ = 861818880.

The previous prime is 1616445863. The next prime is 1616445913. The reversal of 1616445885 is 5885446161.

It is not a de Polignac number, because 1616445885 - 2⁶ = 1616445821 is a prime.

It is a super-2 number, since 2×1616445885² = 5225794598266866450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33750 + ... + 66120.

It is an arithmetic number, because the mean of its divisors is an integer number (161698140).

Almost surely, 2^1616445885 is an apocalyptic number.

1616445885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1616445885 is a deficient number, since it is larger than the sum of its proper divisors (970724355).

1616445885 is a wasteful number, since it uses less digits than its factorization.

1616445885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35708.

The product of its digits is 921600, while the sum is 48.

The square root of 1616445885 is about 40205.0480039509. The cubic root of 1616445885 is about 1173.6007813972.

The spelling of 1616445885 in words is "one billion, six hundred sixteen million, four hundred forty-five thousand, eight hundred eighty-five".