3845761985 has 16 divisors (see below), whose sum is σ = 5018168064. Its totient is φ = 2812370112.

The previous prime is 3845761939. The next prime is 3845762027. The reversal of 3845761985 is 5891675483.

It is a cyclic number.

It is not a de Polignac number, because 3845761985 - 2⁶ = 3845761921 is a prime.

It is a super-2 number, since 2×3845761985² = 29579770490542280450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3845761985.

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, 280517 + ... + 293906.

It is an arithmetic number, because the mean of its divisors is an integer number (313635504).

Almost surely, 2^3845761985 is an apocalyptic number.

It is an amenable number.

3845761985 is a deficient number, since it is larger than the sum of its proper divisors (1172406079).

3845761985 is a wasteful number, since it uses less digits than its factorization.

3845761985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574544.

The product of its digits is 7257600, while the sum is 56.

The square root of 3845761985 is about 62014.2079285062. The cubic root of 3845761985 is about 1566.7299083922.

The spelling of 3845761985 in words is "three billion, eight hundred forty-five million, seven hundred sixty-one thousand, nine hundred eighty-five".