64544545 has 16 divisors (see below), whose sum is σ = 83623680. Its totient is φ = 47542464.

The previous prime is 64544533. The next prime is 64544549. The reversal of 64544545 is 54544546.

It is a cyclic number.

It is not a de Polignac number, because 64544545 - 2⁹ = 64544033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64544549) 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, 30636 + ... + 32674.

It is an arithmetic number, because the mean of its divisors is an integer number (5226480).

Almost surely, 2^64544545 is an apocalyptic number.

64544545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64544545 is a deficient number, since it is larger than the sum of its proper divisors (19079135).

64544545 is a wasteful number, since it uses less digits than its factorization.

64544545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544.

The product of its digits is 192000, while the sum is 37.

The square root of 64544545 is about 8033.9619740200. The cubic root of 64544545 is about 401.1312663251.

Subtracting from 64544545 its reverse (54544546), we obtain a palindrome (9999999).

The spelling of 64544545 in words is "sixty-four million, five hundred forty-four thousand, five hundred forty-five".