1865513545145 has 16 divisors (see below), whose sum is σ = 2311352988672. Its totient is φ = 1443941484480.

The previous prime is 1865513545139. The next prime is 1865513545171. The reversal of 1865513545145 is 5415453155681.

It is not a de Polignac number, because 1865513545145 - 2⁶ = 1865513545081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675002 + ... + 2046131.

It is an arithmetic number, because the mean of its divisors is an integer number (144459561792).

Almost surely, 2^{1865513545145} is an apocalyptic number.

It is an amenable number.

1865513545145 is a deficient number, since it is larger than the sum of its proper divisors (445839443527).

1865513545145 is a wasteful number, since it uses less digits than its factorization.

1865513545145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725592.

The product of its digits is 7200000, while the sum is 53.

The spelling of 1865513545145 in words is "one trillion, eight hundred sixty-five billion, five hundred thirteen million, five hundred forty-five thousand, one hundred forty-five".