640143333613 has 4 divisors (see below), whose sum is σ = 731592381280. Its totient is φ = 548694285948.

The previous prime is 640143333611. The next prime is 640143333629. The reversal of 640143333613 is 316333341046.

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.

It is a cyclic number.

It is not a de Polignac number, because 640143333613 - 2¹ = 640143333611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640143333611) 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, 45724523823 + ... + 45724523836.

It is an arithmetic number, because the mean of its divisors is an integer number (182898095320).

Almost surely, 2^640143333613 is an apocalyptic number.

It is an amenable number.

640143333613 is a deficient number, since it is larger than the sum of its proper divisors (91449047667).

640143333613 is an equidigital number, since it uses as much as digits as its factorization.

640143333613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91449047666.

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

Adding to 640143333613 its reverse (316333341046), we get a palindrome (956476674659).

The spelling of 640143333613 in words is "six hundred forty billion, one hundred forty-three million, three hundred thirty-three thousand, six hundred thirteen".