3634644121 has 16 divisors (see below), whose sum is σ = 3871354240. Its totient is φ = 3402622080.

The previous prime is 3634644071. The next prime is 3634644127. The reversal of 3634644121 is 1214464363.

It is a cyclic number.

It is not a de Polignac number, because 3634644121 - 2¹¹ = 3634642073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3634644127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057021 + ... + 1060453.

It is an arithmetic number, because the mean of its divisors is an integer number (241959640).

Almost surely, 2^3634644121 is an apocalyptic number.

It is an amenable number.

3634644121 is a deficient number, since it is larger than the sum of its proper divisors (236710119).

3634644121 is a wasteful number, since it uses less digits than its factorization.

3634644121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096.

The product of its digits is 41472, while the sum is 34.

The square root of 3634644121 is about 60288.0097614774. The cubic root of 3634644121 is about 1537.5194959609.

The spelling of 3634644121 in words is "three billion, six hundred thirty-four million, six hundred forty-four thousand, one hundred twenty-one".