1215553515552 has 96 divisors (see below), whose sum is σ = 3553786776960. Its totient is φ = 404221950720.

The previous prime is 1215553515493. The next prime is 1215553515559. The reversal of 1215553515552 is 2555153555121.

1215553515552 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 55 + 35 + 15 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1215553515498 and 1215553515507.

It is not an unprimeable number, because it can be changed into a prime (1215553515559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1307148 + ... + 2034635.

It is an arithmetic number, because the mean of its divisors is an integer number (37018612260).

Almost surely, 2^{1215553515552} is an apocalyptic number.

1215553515552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215553515552 is an abundant number, since it is smaller than the sum of its proper divisors (2338233261408).

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

1215553515552 is a wasteful number, since it uses less digits than its factorization.

1215553515552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342223 (or 3342209 counting only the distinct ones).

The product of its digits is 937500, while the sum is 45.

The spelling of 1215553515552 in words is "one trillion, two hundred fifteen billion, five hundred fifty-three million, five hundred fifteen thousand, five hundred fifty-two".