144428728715 has 4 divisors (see below), whose sum is σ = 173314474464. Its totient is φ = 115542982968.

The previous prime is 144428728693. The next prime is 144428728747. The reversal of 144428728715 is 517827824441.

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

It is a cyclic number.

It is not a de Polignac number, because 144428728715 - 2¹⁶ = 144428663179 is a prime.

It is a Duffinian number.

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, 14442872867 + ... + 14442872876.

It is an arithmetic number, because the mean of its divisors is an integer number (43328618616).

Almost surely, 2^144428728715 is an apocalyptic number.

144428728715 is a deficient number, since it is larger than the sum of its proper divisors (28885745749).

144428728715 is an equidigital number, since it uses as much as digits as its factorization.

144428728715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28885745748.

The product of its digits is 4014080, while the sum is 53.

The spelling of 144428728715 in words is "one hundred forty-four billion, four hundred twenty-eight million, seven hundred twenty-eight thousand, seven hundred fifteen".