444864825257 has 4 divisors (see below), whose sum is σ = 444867032976. Its totient is φ = 444862617540.

The previous prime is 444864825253. The next prime is 444864825263. The reversal of 444864825257 is 752528468444.

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 444864825257 - 2² = 444864825253 is a prime.

It is a super-2 number, since 2×444864825257² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444864825196 and 444864825205.

It is not an unprimeable number, because it can be changed into a prime (444864825253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767423 + ... + 1216004.

It is an arithmetic number, because the mean of its divisors is an integer number (111216758244).

Almost surely, 2^444864825257 is an apocalyptic number.

It is an amenable number.

444864825257 is a deficient number, since it is larger than the sum of its proper divisors (2207719).

444864825257 is a wasteful number, since it uses less digits than its factorization.

444864825257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207718.

The product of its digits is 68812800, while the sum is 59.

The spelling of 444864825257 in words is "four hundred forty-four billion, eight hundred sixty-four million, eight hundred twenty-five thousand, two hundred fifty-seven".