444720286538573 has 4 divisors (see below), whose sum is σ = 444721454528988. Its totient is φ = 444719118548160.

The previous prime is 444720286538537. The next prime is 444720286538603. The reversal of 444720286538573 is 375835682027444.

It is a happy number.

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 240731422932484 + 203988863606089 = 15515522^2 + 14282467^2 .

It is a cyclic number.

It is not a de Polignac number, because 444720286538573 - 2⁶ = 444720286538509 is a prime.

It is a super-2 number, since 2×444720286538573² (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 (444720286538503) 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, 583423886 + ... + 584185647.

It is an arithmetic number, because the mean of its divisors is an integer number (111180363632247).

Almost surely, 2^{444720286538573} is an apocalyptic number.

It is an amenable number.

444720286538573 is a deficient number, since it is larger than the sum of its proper divisors (1167990415).

444720286538573 is a wasteful number, since it uses less digits than its factorization.

444720286538573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167990414.

The product of its (nonzero) digits is 1083801600, while the sum is 68.

The spelling of 444720286538573 in words is "four hundred forty-four trillion, seven hundred twenty billion, two hundred eighty-six million, five hundred thirty-eight thousand, five hundred seventy-three".