64554468348221 has 4 divisors (see below), whose sum is σ = 64554499855200. Its totient is φ = 64554436841244.

The previous prime is 64554468348191. The next prime is 64554468348257. The reversal of 64554468348221 is 12284386445546.

64554468348221 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 64554468348221 - 2¹⁸ = 64554468086077 is a prime.

It is a super-2 number, since 2×64554468348221² (a number of 28 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 (64554468341221) 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, 12449111 + ... + 16854948.

It is an arithmetic number, because the mean of its divisors is an integer number (16138624963800).

Almost surely, 2^{64554468348221} is an apocalyptic number.

It is an amenable number.

64554468348221 is a deficient number, since it is larger than the sum of its proper divisors (31506979).

64554468348221 is a wasteful number, since it uses less digits than its factorization.

64554468348221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31506978.

The product of its digits is 176947200, while the sum is 62.

The spelling of 64554468348221 in words is "sixty-four trillion, five hundred fifty-four billion, four hundred sixty-eight million, three hundred forty-eight thousand, two hundred twenty-one".