2145441020015 has 16 divisors (see below), whose sum is σ = 2581984035840. Its totient is φ = 1711387764000.

The previous prime is 2145441019973. The next prime is 2145441020017. The reversal of 2145441020015 is 5100201445412.

It is a happy number.

It is not a de Polignac number, because 2145441020015 - 2¹⁰ = 2145441018991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145441020015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145441020017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3270890 + ... + 3871640.

It is an arithmetic number, because the mean of its divisors is an integer number (161374002240).

Almost surely, 2^{2145441020015} is an apocalyptic number.

2145441020015 is a deficient number, since it is larger than the sum of its proper divisors (436543015825).

2145441020015 is a wasteful number, since it uses less digits than its factorization.

2145441020015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602822.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 2145441020015 its reverse (5100201445412), we get a palindrome (7245642465427).

The spelling of 2145441020015 in words is "two trillion, one hundred forty-five billion, four hundred forty-one million, twenty thousand, fifteen".