2145542545 has 16 divisors (see below), whose sum is σ = 2730309120. Its totient is φ = 1612973824.

The previous prime is 2145542543. The next prime is 2145542551. The reversal of 2145542545 is 5452455412.

It is a cyclic number.

It is not a de Polignac number, because 2145542545 - 2¹ = 2145542543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145542543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36864 + ... + 75166.

It is an arithmetic number, because the mean of its divisors is an integer number (170644320).

Almost surely, 2^2145542545 is an apocalyptic number.

It is an amenable number.

2145542545 is a deficient number, since it is larger than the sum of its proper divisors (584766575).

2145542545 is a wasteful number, since it uses less digits than its factorization.

2145542545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38984.

The product of its digits is 160000, while the sum is 37.

The square root of 2145542545 is about 46320.0015651986. The cubic root of 2145542545 is about 1289.7703144540.

Adding to 2145542545 its reverse (5452455412), we get a palindrome (7597997957).

It can be divided in two parts, 21455 and 42545, that added together give a cube (64000 = 40³).

The spelling of 2145542545 in words is "two billion, one hundred forty-five million, five hundred forty-two thousand, five hundred forty-five".