15444140122 has 8 divisors (see below), whose sum is σ = 23659108416. Its totient is φ = 7557770652.

The previous prime is 15444140111. The next prime is 15444140149. The reversal of 15444140122 is 22104144451.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82149588 + ... + 82149775.

It is an arithmetic number, because the mean of its divisors is an integer number (2957388552).

Almost surely, 2^15444140122 is an apocalyptic number.

15444140122 is a deficient number, since it is larger than the sum of its proper divisors (8214968294).

15444140122 is a wasteful number, since it uses less digits than its factorization.

15444140122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164299412.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 15444140122 its reverse (22104144451), we get a palindrome (37548284573).

The spelling of 15444140122 in words is "fifteen billion, four hundred forty-four million, one hundred forty thousand, one hundred twenty-two".