3644381536801 has 4 divisors (see below), whose sum is σ = 3653997319600. Its totient is φ = 3634765754004.

The previous prime is 3644381536787. The next prime is 3644381536843. The reversal of 3644381536801 is 1086351834463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3644381536801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644381536001) 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 3 ways as a sum of consecutive naturals, for example, 4807890831 + ... + 4807891588.

It is an arithmetic number, because the mean of its divisors is an integer number (913499329900).

Almost surely, 2^{3644381536801} is an apocalyptic number.

It is an amenable number.

3644381536801 is a deficient number, since it is larger than the sum of its proper divisors (9615782799).

3644381536801 is an equidigital number, since it uses as much as digits as its factorization.

3644381536801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9615782798.

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 3644381536801 in words is "three trillion, six hundred forty-four billion, three hundred eighty-one million, five hundred thirty-six thousand, eight hundred one".