7669978484449 has 2 divisors, whose sum is σ = 7669978484450. Its totient is φ = 7669978484448.

The previous prime is 7669978484419. The next prime is 7669978484537. The reversal of 7669978484449 is 9444848799667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7305090000849 + 364888483600 = 2702793^2 + 604060^2 .

It is a cyclic number.

It is not a de Polignac number, because 7669978484449 - 2¹³ = 7669978476257 is a prime.

It is not a weakly prime, because it can be changed into another prime (7669978484419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3834989242224 + 3834989242225.

It is an arithmetic number, because the mean of its divisors is an integer number (3834989242225).

Almost surely, 2^{7669978484449} is an apocalyptic number.

It is an amenable number.

7669978484449 is a deficient number, since it is larger than the sum of its proper divisors (1).

7669978484449 is an equidigital number, since it uses as much as digits as its factorization.

7669978484449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21069103104, while the sum is 85.

The spelling of 7669978484449 in words is "seven trillion, six hundred sixty-nine billion, nine hundred seventy-eight million, four hundred eighty-four thousand, four hundred forty-nine".