1215545504500 has 48 divisors (see below), whose sum is σ = 2656582568640. Its totient is φ = 485882820000.

The previous prime is 1215545504491. The next prime is 1215545504507. The reversal of 1215545504500 is 54055455121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215545504500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215545504507) by changing a digit.

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, 112230 + ... + 1563229.

It is an arithmetic number, because the mean of its divisors is an integer number (55345470180).

Almost surely, 2^{1215545504500} is an apocalyptic number.

1215545504500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215545504500 is an abundant number, since it is smaller than the sum of its proper divisors (1441037064140).

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

1215545504500 is a wasteful number, since it uses less digits than its factorization.

1215545504500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676929 (or 1676917 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 37.

The spelling of 1215545504500 in words is "one trillion, two hundred fifteen billion, five hundred forty-five million, five hundred four thousand, five hundred".