1215444545425 has 24 divisors (see below), whose sum is σ = 1644221102400. Its totient is φ = 883929499200.

The previous prime is 1215444545411. The next prime is 1215444545449. The reversal of 1215444545425 is 5245454445121.

It is a happy number.

It is not a de Polignac number, because 1215444545425 - 2¹¹ = 1215444543377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10889199 + ... + 11000251.

It is an arithmetic number, because the mean of its divisors is an integer number (68509212600).

Almost surely, 2^{1215444545425} is an apocalyptic number.

It is an amenable number.

1215444545425 is a deficient number, since it is larger than the sum of its proper divisors (428776556975).

1215444545425 is a wasteful number, since it uses less digits than its factorization.

1215444545425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150873 (or 150868 counting only the distinct ones).

The product of its digits is 2560000, while the sum is 46.

The spelling of 1215444545425 in words is "one trillion, two hundred fifteen billion, four hundred forty-four million, five hundred forty-five thousand, four hundred twenty-five".