1215443030144 has 128 divisors (see below), whose sum is σ = 2930762736000. Its totient is φ = 490149494784.

The previous prime is 1215443030089. The next prime is 1215443030167. The reversal of 1215443030144 is 4410303445121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1215443030144.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105841427 + ... + 105852909.

It is an arithmetic number, because the mean of its divisors is an integer number (22896583875).

Almost surely, 2^{1215443030144} is an apocalyptic number.

1215443030144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215443030144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465381368000).

1215443030144 is an abundant number, since it is smaller than the sum of its proper divisors (1715319705856).

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

1215443030144 is a wasteful number, since it uses less digits than its factorization.

1215443030144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18470 (or 18458 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1215443030144 its reverse (4410303445121), we get a palindrome (5625746475265).

The spelling of 1215443030144 in words is "one trillion, two hundred fifteen billion, four hundred forty-three million, thirty thousand, one hundred forty-four".