122636447819 has 2 divisors, whose sum is σ = 122636447820. Its totient is φ = 122636447818.

The previous prime is 122636447803. The next prime is 122636447839. The reversal of 122636447819 is 918744636221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122636447819 - 2⁴ = 122636447803 is a prime.

It is a super-2 number, since 2×122636447819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122636447839) 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, 61318223909 + 61318223910.

It is an arithmetic number, because the mean of its divisors is an integer number (61318223910).

Almost surely, 2^122636447819 is an apocalyptic number.

122636447819 is a deficient number, since it is larger than the sum of its proper divisors (1).

122636447819 is an equidigital number, since it uses as much as digits as its factorization.

122636447819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 53.

The spelling of 122636447819 in words is "one hundred twenty-two billion, six hundred thirty-six million, four hundred forty-seven thousand, eight hundred nineteen".