1215450043899 has 16 divisors (see below), whose sum is σ = 1994584687872. Its totient is φ = 641116506528.

The previous prime is 1215450043897. The next prime is 1215450043901. The reversal of 1215450043899 is 9983400545121.

It is an interprime number because it is at equal distance from previous prime (1215450043897) and next prime (1215450043901).

It is not a de Polignac number, because 1215450043899 - 2¹ = 1215450043897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215450043897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2226098709 + ... + 2226099254.

It is an arithmetic number, because the mean of its divisors is an integer number (124661542992).

Almost surely, 2^{1215450043899} is an apocalyptic number.

1215450043899 is a deficient number, since it is larger than the sum of its proper divisors (779134643973).

1215450043899 is a wasteful number, since it uses less digits than its factorization.

1215450043899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452197986.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 1215450043899 in words is "one trillion, two hundred fifteen billion, four hundred fifty million, forty-three thousand, eight hundred ninety-nine".