4149661985 has 16 divisors (see below), whose sum is σ = 5695840512. Its totient is φ = 2843044800.

The previous prime is 4149661963. The next prime is 4149662003. The reversal of 4149661985 is 5891669414.

It is not a de Polignac number, because 4149661985 - 2⁸ = 4149661729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8861 + ... + 91530.

It is an arithmetic number, because the mean of its divisors is an integer number (355990032).

Almost surely, 2^4149661985 is an apocalyptic number.

It is an amenable number.

4149661985 is a deficient number, since it is larger than the sum of its proper divisors (1546178527).

4149661985 is a wasteful number, since it uses less digits than its factorization.

4149661985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101584.

The product of its digits is 1866240, while the sum is 53.

The square root of 4149661985 is about 64417.8700750033. The cubic root of 4149661985 is about 1606.9569443660.

The spelling of 4149661985 in words is "four billion, one hundred forty-nine million, six hundred sixty-one thousand, nine hundred eighty-five".