64641338 has 8 divisors (see below), whose sum is σ = 99327060. Its totient is φ = 31532320.

The previous prime is 64641337. The next prime is 64641383. The reversal of 64641338 is 83314646.

It can be written as a sum of positive squares in 2 ways, for example, as 46553329 + 18088009 = 6823^2 + 4253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64641298 and 64641307.

It is not an unprimeable number, because it can be changed into a prime (64641337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394073 + ... + 394236.

Almost surely, 2^64641338 is an apocalyptic number.

64641338 is a deficient number, since it is larger than the sum of its proper divisors (34685722).

64641338 is a wasteful number, since it uses less digits than its factorization.

64641338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788352.

The product of its digits is 41472, while the sum is 35.

The square root of 64641338 is about 8039.9837064512. The cubic root of 64641338 is about 401.3316824679.

The spelling of 64641338 in words is "sixty-four million, six hundred forty-one thousand, three hundred thirty-eight".