1215488399745 has 16 divisors (see below), whose sum is σ = 1946326173120. Its totient is φ = 647745568704.

The previous prime is 1215488399731. The next prime is 1215488399777. The reversal of 1215488399745 is 5479938845121.

It is not a de Polignac number, because 1215488399745 - 2¹⁰ = 1215488398721 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 32162434 + ... + 32200203.

It is an arithmetic number, because the mean of its divisors is an integer number (121645385820).

Almost surely, 2^{1215488399745} is an apocalyptic number.

1215488399745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215488399745 is a deficient number, since it is larger than the sum of its proper divisors (730837773375).

1215488399745 is a wasteful number, since it uses less digits than its factorization.

1215488399745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64363904.

The product of its digits is 87091200, while the sum is 66.

The spelling of 1215488399745 in words is "one trillion, two hundred fifteen billion, four hundred eighty-eight million, three hundred ninety-nine thousand, seven hundred forty-five".