144428721500 has 48 divisors (see below), whose sum is σ = 360494097600. Its totient is φ = 49518417600.

The previous prime is 144428721439. The next prime is 144428721509. The reversal of 144428721500 is 5127824441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144428721509) 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, 20629175 + ... + 20636174.

It is an arithmetic number, because the mean of its divisors is an integer number (7510293700).

Almost surely, 2^144428721500 is an apocalyptic number.

144428721500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144428721500 is an abundant number, since it is smaller than the sum of its proper divisors (216065376100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144428721500 is a wasteful number, since it uses less digits than its factorization.

144428721500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41265375 (or 41265363 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 144428721500 in words is "one hundred forty-four billion, four hundred twenty-eight million, seven hundred twenty-one thousand, five hundred".