1320644410401 has 64 divisors (see below), whose sum is σ = 1887750171648. Its totient is φ = 820001242368.

The previous prime is 1320644410391. The next prime is 1320644410417. The reversal of 1320644410401 is 1040144460231.

It is not a de Polignac number, because 1320644410401 - 2⁵ = 1320644410369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320644410471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62988346 + ... + 63009308.

It is an arithmetic number, because the mean of its divisors is an integer number (29496096432).

Almost surely, 2^{1320644410401} is an apocalyptic number.

It is an amenable number.

1320644410401 is a deficient number, since it is larger than the sum of its proper divisors (567105761247).

1320644410401 is a wasteful number, since it uses less digits than its factorization.

1320644410401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21310.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1320644410401 its reverse (1040144460231), we get a palindrome (2360788870632).

The spelling of 1320644410401 in words is "one trillion, three hundred twenty billion, six hundred forty-four million, four hundred ten thousand, four hundred one".