4020641425663 has 4 divisors (see below), whose sum is σ = 4020648334560. Its totient is φ = 4020634516768.

The previous prime is 4020641425657. The next prime is 4020641425673. The reversal of 4020641425663 is 3665241460204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4020641425663 - 2²⁹ = 4020104554751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020641425673) 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, 2492170 + ... + 3775207.

It is an arithmetic number, because the mean of its divisors is an integer number (1005162083640).

Almost surely, 2^{4020641425663} is an apocalyptic number.

4020641425663 is a deficient number, since it is larger than the sum of its proper divisors (6908897).

4020641425663 is an equidigital number, since it uses as much as digits as its factorization.

4020641425663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908896.

The product of its (nonzero) digits is 829440, while the sum is 43.

Adding to 4020641425663 its reverse (3665241460204), we get a palindrome (7685882885867).

The spelling of 4020641425663 in words is "four trillion, twenty billion, six hundred forty-one million, four hundred twenty-five thousand, six hundred sixty-three".