3985167809 has 8 divisors (see below), whose sum is σ = 4564855680. Its totient is φ = 3408074496.

The previous prime is 3985167793. The next prime is 3985167817. The reversal of 3985167809 is 9087615893.

3985167809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3985167809 - 2⁴ = 3985167793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3985167859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645344 + ... + 651489.

It is an arithmetic number, because the mean of its divisors is an integer number (570606960).

Almost surely, 2^3985167809 is an apocalyptic number.

It is an amenable number.

3985167809 is a deficient number, since it is larger than the sum of its proper divisors (579687871).

3985167809 is a wasteful number, since it uses less digits than its factorization.

3985167809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297279.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 3985167809 is about 63128.1855354643. The cubic root of 3985167809 is about 1585.4365688649.

The spelling of 3985167809 in words is "three billion, nine hundred eighty-five million, one hundred sixty-seven thousand, eight hundred nine".