144121315545 has 48 divisors (see below), whose sum is σ = 257939415552. Its totient is φ = 74364791040.

The previous prime is 144121315489. The next prime is 144121315549. The reversal of 144121315545 is 545513121441.

144121315545 is a `hidden beast` number, since 1 + 441 + 21 + 3 + 155 + 45 = 666.

It is not a de Polignac number, because 144121315545 - 2¹⁰ = 144121314521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144121315549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5982294 + ... + 6006336.

It is an arithmetic number, because the mean of its divisors is an integer number (5373737824).

Almost surely, 2^144121315545 is an apocalyptic number.

144121315545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144121315545 is a deficient number, since it is larger than the sum of its proper divisors (113818100007).

144121315545 is a wasteful number, since it uses less digits than its factorization.

144121315545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28382 (or 28379 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 144121315545 its reverse (545513121441), we get a palindrome (689634436986).

The spelling of 144121315545 in words is "one hundred forty-four billion, one hundred twenty-one million, three hundred fifteen thousand, five hundred forty-five".