64646055727333 has 4 divisors (see below), whose sum is σ = 64897596800460. Its totient is φ = 64394514654208.

The previous prime is 64646055727291. The next prime is 64646055727343. The reversal of 64646055727333 is 33372755064646.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38064173926689 + 26581881800644 = 6169617^2 + 5155762^2 .

It is a cyclic number.

It is not a de Polignac number, because 64646055727333 - 2²⁹ = 64645518856421 is a prime.

It is a super-2 number, since 2×64646055727333² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64646055727343) 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, 125770536178 + ... + 125770536691.

It is an arithmetic number, because the mean of its divisors is an integer number (16224399200115).

Almost surely, 2^{64646055727333} is an apocalyptic number.

It is an amenable number.

64646055727333 is a deficient number, since it is larger than the sum of its proper divisors (251541073127).

64646055727333 is a wasteful number, since it uses less digits than its factorization.

64646055727333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251541073126.

The product of its (nonzero) digits is 228614400, while the sum is 61.

The spelling of 64646055727333 in words is "sixty-four trillion, six hundred forty-six billion, fifty-five million, seven hundred twenty-seven thousand, three hundred thirty-three".