8440840840829 has 2 divisors, whose sum is σ = 8440840840830. Its totient is φ = 8440840840828.

The previous prime is 8440840840819. The next prime is 8440840840889. The reversal of 8440840840829 is 9280480480448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7712156663929 + 728684176900 = 2777077^2 + 853630^2 .

It is a cyclic number.

It is not a de Polignac number, because 8440840840829 - 2²⁴ = 8440824063613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8440840840819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4220420420414 + 4220420420415.

It is an arithmetic number, because the mean of its divisors is an integer number (4220420420415).

Almost surely, 2^{8440840840829} is an apocalyptic number.

It is an amenable number.

8440840840829 is a deficient number, since it is larger than the sum of its proper divisors (1).

8440840840829 is an equidigital number, since it uses as much as digits as its factorization.

8440840840829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18874368, while the sum is 59.

The spelling of 8440840840829 in words is "eight trillion, four hundred forty billion, eight hundred forty million, eight hundred forty thousand, eight hundred twenty-nine".