1215728515984 has 40 divisors (see below), whose sum is σ = 2413942794648. Its totient is φ = 592788049920.

The previous prime is 1215728515933. The next prime is 1215728515997. The reversal of 1215728515984 is 4895158275121.

It can be written as a sum of positive squares in 4 ways, for example, as 11942118400 + 1203786397584 = 109280^2 + 1097172^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1169484 + ... + 1949140.

Almost surely, 2^{1215728515984} is an apocalyptic number.

It is an amenable number.

1215728515984 is a deficient number, since it is larger than the sum of its proper divisors (1198214278664).

1215728515984 is a wasteful number, since it uses less digits than its factorization.

1215728515984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782083 (or 782077 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 58.

The spelling of 1215728515984 in words is "one trillion, two hundred fifteen billion, seven hundred twenty-eight million, five hundred fifteen thousand, nine hundred eighty-four".