3633646401 has 36 divisors (see below), whose sum is σ = 6660570384. Its totient is φ = 1887606000.

The previous prime is 3633646349. The next prime is 3633646409. The reversal of 3633646401 is 1046463363.

3633646401 is a `hidden beast` number, since 3 + 6 + 3 + 3 + 6 + 4 + 640 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-3633646401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3633646409) 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 35 ways as a sum of consecutive naturals, for example, 369675 + ... + 379376.

It is an arithmetic number, because the mean of its divisors is an integer number (185015844).

Almost surely, 2^3633646401 is an apocalyptic number.

It is an amenable number.

3633646401 is a deficient number, since it is larger than the sum of its proper divisors (3026923983).

3633646401 is a wasteful number, since it uses less digits than its factorization.

3633646401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749082 (or 749072 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 3633646401 is about 60279.7345797076. The cubic root of 3633646401 is about 1537.3787986157.

The spelling of 3633646401 in words is "three billion, six hundred thirty-three million, six hundred forty-six thousand, four hundred one".