640033635047 has 2 divisors, whose sum is σ = 640033635048. Its totient is φ = 640033635046.

The previous prime is 640033635037. The next prime is 640033635077. The reversal of 640033635047 is 740536330046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640033635047 - 2²⁰ = 640032586471 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640033634995 and 640033635013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640033635037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320016817523 + 320016817524.

It is an arithmetic number, because the mean of its divisors is an integer number (320016817524).

Almost surely, 2^640033635047 is an apocalyptic number.

640033635047 is a deficient number, since it is larger than the sum of its proper divisors (1).

640033635047 is an equidigital number, since it uses as much as digits as its factorization.

640033635047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 41.

The spelling of 640033635047 in words is "six hundred forty billion, thirty-three million, six hundred thirty-five thousand, forty-seven".