640033635037 has 2 divisors, whose sum is σ = 640033635038. Its totient is φ = 640033635036.

The previous prime is 640033634963. The next prime is 640033635047. The reversal of 640033635037 is 730536330046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640033600441 + 34596 = 800021^2 + 186^2 .

It is a cyclic number.

It is not a de Polignac number, because 640033635037 - 2¹⁵ = 640033602269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640033635047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320016817518 + 320016817519.

It is an arithmetic number, because the mean of its divisors is an integer number (320016817519).

Almost surely, 2^640033635037 is an apocalyptic number.

It is an amenable number.

640033635037 is a deficient number, since it is larger than the sum of its proper divisors (1).

640033635037 is an equidigital number, since it uses as much as digits as its factorization.

640033635037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 40.

The spelling of 640033635037 in words is "six hundred forty billion, thirty-three million, six hundred thirty-five thousand, thirty-seven".