4644368221553 has 8 divisors (see below), whose sum is σ = 4846394357376. Its totient is φ = 4442350176000.

The previous prime is 4644368221531. The next prime is 4644368221583. The reversal of 4644368221553 is 3551228634464.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4644368221553 - 2¹⁶ = 4644368156017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4644368221495 and 4644368221504.

It is not an unprimeable number, because it can be changed into a prime (4644368221523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834608 + ... + 3159953.

It is an arithmetic number, because the mean of its divisors is an integer number (605799294672).

Almost surely, 2^{4644368221553} is an apocalyptic number.

It is an amenable number.

4644368221553 is a deficient number, since it is larger than the sum of its proper divisors (202026135823).

4644368221553 is a wasteful number, since it uses less digits than its factorization.

4644368221553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045135.

The product of its digits is 16588800, while the sum is 53.

The spelling of 4644368221553 in words is "four trillion, six hundred forty-four billion, three hundred sixty-eight million, two hundred twenty-one thousand, five hundred fifty-three".