64344813 has 64 divisors (see below), whose sum is σ = 104493312. Its totient is φ = 34836480.

The previous prime is 64344793. The next prime is 64344817. The reversal of 64344813 is 31844346.

It is a happy number.

It is not a de Polignac number, because 64344813 - 2¹⁰ = 64343789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64344817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1054803 + ... + 1054863.

It is an arithmetic number, because the mean of its divisors is an integer number (1632708).

Almost surely, 2^64344813 is an apocalyptic number.

It is an amenable number.

64344813 is a deficient number, since it is larger than the sum of its proper divisors (40148499).

64344813 is a wasteful number, since it uses less digits than its factorization.

64344813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174.

The product of its digits is 27648, while the sum is 33.

The square root of 64344813 is about 8021.5218630881. The cubic root of 64344813 is about 400.7170741601.

The spelling of 64344813 in words is "sixty-four million, three hundred forty-four thousand, eight hundred thirteen".