1215545503424 has 112 divisors (see below), whose sum is σ = 2920596452928. Its totient is φ = 490009264128.

The previous prime is 1215545503421. The next prime is 1215545503433. The reversal of 1215545503424 is 4243055455121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (1215545503421) 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, 12846752 + ... + 12941024.

It is an arithmetic number, because the mean of its divisors is an integer number (26076754044).

Almost surely, 2^{1215545503424} is an apocalyptic number.

1215545503424 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 1215545503424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1460298226464).

1215545503424 is an abundant number, since it is smaller than the sum of its proper divisors (1705050949504).

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

1215545503424 is a wasteful number, since it uses less digits than its factorization.

1215545503424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96002 (or 95992 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 1215545503424 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, five hundred three thousand, four hundred twenty-four".