56641207708221 has 4 divisors (see below), whose sum is σ = 75521610277632. Its totient is φ = 37760805138812.

The previous prime is 56641207708207. The next prime is 56641207708343. The reversal of 56641207708221 is 12280770214665.

56641207708221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 56641207708221 - 2⁶ = 56641207708157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56641207708621) 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, 9440201284701 + ... + 9440201284706.

It is an arithmetic number, because the mean of its divisors is an integer number (18880402569408).

Almost surely, 2^{56641207708221} is an apocalyptic number.

It is an amenable number.

56641207708221 is a deficient number, since it is larger than the sum of its proper divisors (18880402569411).

56641207708221 is a wasteful number, since it uses less digits than its factorization.

56641207708221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18880402569410.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 56641207708221 in words is "fifty-six trillion, six hundred forty-one billion, two hundred seven million, seven hundred eight thousand, two hundred twenty-one".