1215514545552 has 60 divisors (see below), whose sum is σ = 3401929847004. Its totient is φ = 405150393600.

The previous prime is 1215514545541. The next prime is 1215514545593. The reversal of 1215514545552 is 2555454155121.

It is a happy number.

1215514545552 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 5 + 145 + 455 + 52 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 416535996816 + 798978548736 = 645396^2 + 893856^2 .

It is a super-2 number, since 2×1215514545552² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215514545498 and 1215514545507.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2684578 + ... + 3104510.

Almost surely, 2^{1215514545552} is an apocalyptic number.

1215514545552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215514545552 is an abundant number, since it is smaller than the sum of its proper divisors (2186415301452).

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

1215514545552 is a wasteful number, since it uses less digits than its factorization.

1215514545552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440048 (or 440039 counting only the distinct ones).

The product of its digits is 1000000, while the sum is 45.

The spelling of 1215514545552 in words is "one trillion, two hundred fifteen billion, five hundred fourteen million, five hundred forty-five thousand, five hundred fifty-two".