2145064913 has 18 divisors (see below), whose sum is σ = 2330347986. Its totient is φ = 1967662144.

The previous prime is 2145064897. The next prime is 2145064921. The reversal of 2145064913 is 3194605412.

It can be written as a sum of positive squares in only one way, i.e., 2018884624 + 126180289 = 44932^2 + 11233^2 .

It is not a de Polignac number, because 2145064913 - 2⁴ = 2145064897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2145064963) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8975048 + ... + 8975286.

It is an arithmetic number, because the mean of its divisors is an integer number (129463777).

Almost surely, 2^2145064913 is an apocalyptic number.

It is an amenable number.

2145064913 is a deficient number, since it is larger than the sum of its proper divisors (185283073).

2145064913 is an frugal number, since it uses more digits than its factorization.

2145064913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2145064913 is about 46314.8454925632. The cubic root of 2145064913 is about 1289.6745995348.

The spelling of 2145064913 in words is "two billion, one hundred forty-five million, sixty-four thousand, nine hundred thirteen".