640136332223 has 8 divisors (see below), whose sum is σ = 640816246896. Its totient is φ = 639456523200.

The previous prime is 640136332219. The next prime is 640136332259. The reversal of 640136332223 is 322233631046.

640136332223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 640136332223 - 2² = 640136332219 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 (640136332523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19661468 + ... + 19693998.

It is an arithmetic number, because the mean of its divisors is an integer number (80102030862).

Almost surely, 2^640136332223 is an apocalyptic number.

640136332223 is a deficient number, since it is larger than the sum of its proper divisors (679914673).

640136332223 is a wasteful number, since it uses less digits than its factorization.

640136332223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52825.

The product of its (nonzero) digits is 93312, while the sum is 35.

Adding to 640136332223 its reverse (322233631046), we get a palindrome (962369963269).

The spelling of 640136332223 in words is "six hundred forty billion, one hundred thirty-six million, three hundred thirty-two thousand, two hundred twenty-three".