120144543222555 has 72 divisors (see below), whose sum is σ = 230504380954848. Its totient is φ = 57685768555008.

The previous prime is 120144543222551. The next prime is 120144543222577. The reversal of 120144543222555 is 555222345441021.

120144543222555 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 4 + 45 + 4 + 32 + 22 + 555 = 666.

It is not a de Polignac number, because 120144543222555 - 2² = 120144543222551 is a prime.

It is a super-3 number, since 3×120144543222555³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 120144543222555.

It is not an unprimeable number, because it can be changed into a prime (120144543222551) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 148037367 + ... + 148846736.

It is an arithmetic number, because the mean of its divisors is an integer number (3201449735484).

Almost surely, 2^{120144543222555} is an apocalyptic number.

120144543222555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120144543222555 is a deficient number, since it is larger than the sum of its proper divisors (110359837732293).

120144543222555 is a wasteful number, since it uses less digits than its factorization.

120144543222555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296884177 (or 296884151 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

Adding to 120144543222555 its reverse (555222345441021), we get a palindrome (675366888663576).

The spelling of 120144543222555 in words is "one hundred twenty trillion, one hundred forty-four billion, five hundred forty-three million, two hundred twenty-two thousand, five hundred fifty-five".