64023326221 has 4 divisors (see below), whose sum is σ = 67789404252. Its totient is φ = 60257248192.

The previous prime is 64023326177. The next prime is 64023326243. The reversal of 64023326221 is 12262332046.

64023326221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 20400408900 + 43622917321 = 142830^2 + 208861^2 .

It is a cyclic number.

It is not a de Polignac number, because 64023326221 - 2¹⁷ = 64023195149 is a prime.

It is a super-2 number, since 2×64023326221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64023326281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883038990 + ... + 1883039023.

It is an arithmetic number, because the mean of its divisors is an integer number (16947351063).

Almost surely, 2^64023326221 is an apocalyptic number.

It is an amenable number.

64023326221 is a deficient number, since it is larger than the sum of its proper divisors (3766078031).

64023326221 is a wasteful number, since it uses less digits than its factorization.

64023326221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766078030.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 64023326221 its reverse (12262332046), we get a palindrome (76285658267).

The spelling of 64023326221 in words is "sixty-four billion, twenty-three million, three hundred twenty-six thousand, two hundred twenty-one".