3646621161 has 16 divisors (see below), whose sum is σ = 5412752320. Its totient is φ = 2426423040.

The previous prime is 3646621129. The next prime is 3646621163. The reversal of 3646621161 is 1611266463.

It is a happy number.

3646621161 is a `hidden beast` number, since 3 + 646 + 6 + 2 + 1 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 3646621161 - 2⁵ = 3646621129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3646621163) by changing a digit.

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, 115000 + ... + 143241.

It is an arithmetic number, because the mean of its divisors is an integer number (338297020).

Almost surely, 2^3646621161 is an apocalyptic number.

It is an amenable number.

3646621161 is a deficient number, since it is larger than the sum of its proper divisors (1766131159).

3646621161 is a wasteful number, since it uses less digits than its factorization.

3646621161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258773 (or 258767 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 3646621161 is about 60387.2599229341. The cubic root of 3646621161 is about 1539.2064783822.

The spelling of 3646621161 in words is "three billion, six hundred forty-six million, six hundred twenty-one thousand, one hundred sixty-one".