2145540045 has 64 divisors (see below), whose sum is σ = 3855237120. Its totient is φ = 1009881600.

The previous prime is 2145540043. The next prime is 2145540079. The reversal of 2145540045 is 5400455412.

It is not a de Polignac number, because 2145540045 - 2¹ = 2145540043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145539994 and 2145540021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145540043) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1616172 + ... + 1617498.

It is an arithmetic number, because the mean of its divisors is an integer number (60238080).

Almost surely, 2^2145540045 is an apocalyptic number.

It is an amenable number.

2145540045 is a deficient number, since it is larger than the sum of its proper divisors (1709697075).

2145540045 is a wasteful number, since it uses less digits than its factorization.

2145540045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2145540045 is about 46319.9745790086. The cubic root of 2145540045 is about 1289.7698135042.

Adding to 2145540045 its reverse (5400455412), we get a palindrome (7545995457).

The spelling of 2145540045 in words is "two billion, one hundred forty-five million, five hundred forty thousand, forty-five".