43338678769 has 2 divisors, whose sum is σ = 43338678770. Its totient is φ = 43338678768.

The previous prime is 43338678737. The next prime is 43338678821. The reversal of 43338678769 is 96787683334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34101162225 + 9237516544 = 184665^2 + 96112^2 .

It is a cyclic number.

It is not a de Polignac number, because 43338678769 - 2⁵ = 43338678737 is a prime.

It is a super-2 number, since 2×43338678769² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43338678769.

It is not a weakly prime, because it can be changed into another prime (43338628769) 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, 21669339384 + 21669339385.

It is an arithmetic number, because the mean of its divisors is an integer number (21669339385).

Almost surely, 2^43338678769 is an apocalyptic number.

It is an amenable number.

43338678769 is a deficient number, since it is larger than the sum of its proper divisors (1).

43338678769 is an equidigital number, since it uses as much as digits as its factorization.

43338678769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 64.

The spelling of 43338678769 in words is "forty-three billion, three hundred thirty-eight million, six hundred seventy-eight thousand, seven hundred sixty-nine".