640033634963 has 2 divisors, whose sum is σ = 640033634964. Its totient is φ = 640033634962.

The previous prime is 640033634941. The next prime is 640033635037. The reversal of 640033634963 is 369436330046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640033634963 - 2²⁴ = 640016857747 is a prime.

It is a super-2 number, since 2×640033634963² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (640033639963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320016817481 + 320016817482.

It is an arithmetic number, because the mean of its divisors is an integer number (320016817482).

Almost surely, 2^640033634963 is an apocalyptic number.

640033634963 is a deficient number, since it is larger than the sum of its proper divisors (1).

640033634963 is an equidigital number, since it uses as much as digits as its factorization.

640033634963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 47.

The spelling of 640033634963 in words is "six hundred forty billion, thirty-three million, six hundred thirty-four thousand, nine hundred sixty-three".