69638650849 has 2 divisors, whose sum is σ = 69638650850. Its totient is φ = 69638650848.

The previous prime is 69638650843. The next prime is 69638650901. The reversal of 69638650849 is 94805683696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37015066449 + 32623584400 = 192393^2 + 180620^2 .

It is a cyclic number.

It is not a de Polignac number, because 69638650849 - 2²³ = 69630262241 is a prime.

It is not a weakly prime, because it can be changed into another prime (69638650843) 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, 34819325424 + 34819325425.

It is an arithmetic number, because the mean of its divisors is an integer number (34819325425).

Almost surely, 2^69638650849 is an apocalyptic number.

It is an amenable number.

69638650849 is a deficient number, since it is larger than the sum of its proper divisors (1).

69638650849 is an equidigital number, since it uses as much as digits as its factorization.

69638650849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67184640, while the sum is 64.

The spelling of 69638650849 in words is "sixty-nine billion, six hundred thirty-eight million, six hundred fifty thousand, eight hundred forty-nine".