645113441 has 16 divisors (see below), whose sum is σ = 801116160. Its totient is φ = 506949840.

The previous prime is 645113431. The next prime is 645113449. The reversal of 645113441 is 144311546.

645113441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 645113441 - 2⁶ = 645113377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645113449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74111 + ... + 82356.

It is an arithmetic number, because the mean of its divisors is an integer number (50069760).

Almost surely, 2^645113441 is an apocalyptic number.

It is an amenable number.

645113441 is a deficient number, since it is larger than the sum of its proper divisors (156002719).

645113441 is a wasteful number, since it uses less digits than its factorization.

645113441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156524.

The product of its digits is 5760, while the sum is 29.

The square root of 645113441 is about 25399.0834677159. The cubic root of 645113441 is about 864.0629102462.

Adding to 645113441 its reverse (144311546), we get a palindrome (789424987).

The spelling of 645113441 in words is "six hundred forty-five million, one hundred thirteen thousand, four hundred forty-one".