3905605161 has 32 divisors (see below), whose sum is σ = 5927687040. Its totient is φ = 2540160000.

The previous prime is 3905605159. The next prime is 3905605163. The reversal of 3905605161 is 1615065093.

3905605161 is a `hidden beast` number, since 3 + 90 + 56 + 0 + 516 + 1 = 666.

3905605161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3905605159) and next prime (3905605163).

It is not a de Polignac number, because 3905605161 - 2¹ = 3905605159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3905605163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1392961 + ... + 1395761.

It is an arithmetic number, because the mean of its divisors is an integer number (185240220).

Almost surely, 2^3905605161 is an apocalyptic number.

It is an amenable number.

3905605161 is a deficient number, since it is larger than the sum of its proper divisors (2022081879).

3905605161 is a wasteful number, since it uses less digits than its factorization.

3905605161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054 (or 4048 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 3905605161 is about 62494.8410750839. The cubic root of 3905605161 is about 1574.8146466683.

The spelling of 3905605161 in words is "three billion, nine hundred five million, six hundred five thousand, one hundred sixty-one".