444321425025551 has 4 divisors (see below), whose sum is σ = 444336773475000. Its totient is φ = 444306076576104.

The previous prime is 444321425025523. The next prime is 444321425025557. The reversal of 444321425025551 is 155520524123444.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444321425025551 is a prime.

It is a super-2 number, since 2×444321425025551² (a number of 30 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 = 444321425025496 and 444321425025505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444321425025557) 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, 7674181301 + ... + 7674239198.

It is an arithmetic number, because the mean of its divisors is an integer number (111084193368750).

Almost surely, 2^{444321425025551} is an apocalyptic number.

444321425025551 is a deficient number, since it is larger than the sum of its proper divisors (15348449449).

444321425025551 is a wasteful number, since it uses less digits than its factorization.

444321425025551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15348449448.

The product of its (nonzero) digits is 3840000, while the sum is 47.

Adding to 444321425025551 its reverse (155520524123444), we get a palindrome (599841949148995).

The spelling of 444321425025551 in words is "four hundred forty-four trillion, three hundred twenty-one billion, four hundred twenty-five million, twenty-five thousand, five hundred fifty-one".