2155040545 has 16 divisors (see below), whose sum is σ = 3083984640. Its totient is φ = 1413491904.

The previous prime is 2155040539. The next prime is 2155040597. The reversal of 2155040545 is 5450405512.

It is a cyclic number.

It is not a de Polignac number, because 2155040545 - 2⁹ = 2155040033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337730 + ... + 1339339.

It is an arithmetic number, because the mean of its divisors is an integer number (192749040).

Almost surely, 2^2155040545 is an apocalyptic number.

It is an amenable number.

2155040545 is a deficient number, since it is larger than the sum of its proper divisors (928944095).

2155040545 is a wasteful number, since it uses less digits than its factorization.

2155040545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677104.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 2155040545 is about 46422.4142521692. The cubic root of 2155040545 is about 1291.6707205053.

The spelling of 2155040545 in words is "two billion, one hundred fifty-five million, forty thousand, five hundred forty-five".