640026361333 has 2 divisors, whose sum is σ = 640026361334. Its totient is φ = 640026361332.

The previous prime is 640026361241. The next prime is 640026361349. The reversal of 640026361333 is 333163620046.

640026361333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323325292689 + 316701068644 = 568617^2 + 562762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640026361333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640026361292 and 640026361301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640026361033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320013180666 + 320013180667.

It is an arithmetic number, because the mean of its divisors is an integer number (320013180667).

Almost surely, 2^640026361333 is an apocalyptic number.

It is an amenable number.

640026361333 is a deficient number, since it is larger than the sum of its proper divisors (1).

640026361333 is an equidigital number, since it uses as much as digits as its factorization.

640026361333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 37.

Adding to 640026361333 its reverse (333163620046), we get a palindrome (973189981379).

The spelling of 640026361333 in words is "six hundred forty billion, twenty-six million, three hundred sixty-one thousand, three hundred thirty-three".