40208880643 has 2 divisors, whose sum is σ = 40208880644. Its totient is φ = 40208880642.

The previous prime is 40208880637. The next prime is 40208880661. The reversal of 40208880643 is 34608880204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40208880643 - 2²⁹ = 39672009731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40208880643.

It is not a weakly prime, because it can be changed into another prime (40208880343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20104440321 + 20104440322.

It is an arithmetic number, because the mean of its divisors is an integer number (20104440322).

Almost surely, 2^40208880643 is an apocalyptic number.

40208880643 is a deficient number, since it is larger than the sum of its proper divisors (1).

40208880643 is an equidigital number, since it uses as much as digits as its factorization.

40208880643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 40208880643 in words is "forty billion, two hundred eight million, eight hundred eighty thousand, six hundred forty-three".