640006361333 has 4 divisors (see below), whose sum is σ = 644891906208. Its totient is φ = 635120816460.

The previous prime is 640006361329. The next prime is 640006361369. The reversal of 640006361333 is 333163600046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 333163600046 = 2 ⋅166581800023.

It is a cyclic number.

It is not a de Polignac number, because 640006361333 - 2² = 640006361329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640006361293 and 640006361302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640026361333) 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 3 ways as a sum of consecutive naturals, for example, 2442772241 + ... + 2442772502.

It is an arithmetic number, because the mean of its divisors is an integer number (161222976552).

Almost surely, 2^640006361333 is an apocalyptic number.

It is an amenable number.

640006361333 is a deficient number, since it is larger than the sum of its proper divisors (4885544875).

640006361333 is a wasteful number, since it uses less digits than its factorization.

640006361333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885544874.

The product of its (nonzero) digits is 69984, while the sum is 35.

Adding to 640006361333 its reverse (333163600046), we get a palindrome (973169961379).

The spelling of 640006361333 in words is "six hundred forty billion, six million, three hundred sixty-one thousand, three hundred thirty-three".