444513012533021 has 16 divisors (see below), whose sum is σ = 464063198886144. Its totient is φ = 424981491394944.

The previous prime is 444513012533003. The next prime is 444513012533053. The reversal of 444513012533021 is 120335210315444.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444513012533021 is a prime.

It is a super-2 number, since 2×444513012533021² (a number of 30 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 (444513012533221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529262600 + ... + 530101806.

It is an arithmetic number, because the mean of its divisors is an integer number (29003949930384).

Almost surely, 2^{444513012533021} is an apocalyptic number.

It is an amenable number.

444513012533021 is a deficient number, since it is larger than the sum of its proper divisors (19550186353123).

444513012533021 is a wasteful number, since it uses less digits than its factorization.

444513012533021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850300.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 444513012533021 its reverse (120335210315444), we get a palindrome (564848222848465).

The spelling of 444513012533021 in words is "four hundred forty-four trillion, five hundred thirteen billion, twelve million, five hundred thirty-three thousand, twenty-one".