444041142121551 has 16 divisors (see below), whose sum is σ = 637695765705600. Its totient is φ = 273213989616480.

The previous prime is 444041142121487. The next prime is 444041142121571. The reversal of 444041142121551 is 155121241140444.

It is not a de Polignac number, because 444041142121551 - 2⁶ = 444041142121487 is a prime.

It is a super-2 number, since 2×444041142121551² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444041142121571) 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, 876782001 + ... + 877288298.

It is an arithmetic number, because the mean of its divisors is an integer number (39855985356600).

Almost surely, 2^{444041142121551} is an apocalyptic number.

444041142121551 is a deficient number, since it is larger than the sum of its proper divisors (193654623584049).

444041142121551 is a wasteful number, since it uses less digits than its factorization.

444041142121551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754076806.

The product of its (nonzero) digits is 102400, while the sum is 39.

Adding to 444041142121551 its reverse (155121241140444), we get a palindrome (599162383261995).

The spelling of 444041142121551 in words is "four hundred forty-four trillion, forty-one billion, one hundred forty-two million, one hundred twenty-one thousand, five hundred fifty-one".