64561211 has 12 divisors (see below), whose sum is σ = 76267080. Its totient is φ = 54175680.

The previous prime is 64561201. The next prime is 64561213. The reversal of 64561211 is 11216546.

64561211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64561211 - 2¹⁴ = 64544827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64561213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15506 + ... + 19223.

It is an arithmetic number, because the mean of its divisors is an integer number (6355590).

Almost surely, 2^64561211 is an apocalyptic number.

64561211 is a deficient number, since it is larger than the sum of its proper divisors (11705869).

64561211 is a wasteful number, since it uses less digits than its factorization.

64561211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34766 (or 34753 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 64561211 is about 8034.9991288114. Note that the first 3 decimals coincide. The cubic root of 64561211 is about 401.1657886247.

Adding to 64561211 its reverse (11216546), we get a palindrome (75777757).

It can be divided in two parts, 6456 and 1211, that added together give a palindrome (7667).

The spelling of 64561211 in words is "sixty-four million, five hundred sixty-one thousand, two hundred eleven".