640230835603 has 2 divisors, whose sum is σ = 640230835604. Its totient is φ = 640230835602.

The previous prime is 640230835577. The next prime is 640230835637. The reversal of 640230835603 is 306538032046.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640230835603 - 2²¹ = 640228738451 is a prime.

It is a super-2 number, since 2×640230835603² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (640230833603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320115417801 + 320115417802.

It is an arithmetic number, because the mean of its divisors is an integer number (320115417802).

Almost surely, 2^640230835603 is an apocalyptic number.

640230835603 is a deficient number, since it is larger than the sum of its proper divisors (1).

640230835603 is an equidigital number, since it uses as much as digits as its factorization.

640230835603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 640230835603 its reverse (306538032046), we get a palindrome (946768867649).

The spelling of 640230835603 in words is "six hundred forty billion, two hundred thirty million, eight hundred thirty-five thousand, six hundred three".