6401320640332 has 12 divisors (see below), whose sum is σ = 11202395163120. Its totient is φ = 3200636308016.

The previous prime is 6401320640321. The next prime is 6401320640333. The reversal of 6401320640332 is 2330460231046.

It is not an unprimeable number, because it can be changed into a prime (6401320640333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5396407 + ... + 6474862.

It is an arithmetic number, because the mean of its divisors is an integer number (933532930260).

Almost surely, 2^{6401320640332} is an apocalyptic number.

It is an amenable number.

6401320640332 is a deficient number, since it is larger than the sum of its proper divisors (4801074522788).

6401320640332 is a wasteful number, since it uses less digits than its factorization.

6401320640332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12006080 (or 12006078 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 6401320640332 its reverse (2330460231046), we get a palindrome (8731780871378).

The spelling of 6401320640332 in words is "six trillion, four hundred one billion, three hundred twenty million, six hundred forty thousand, three hundred thirty-two".