122445556779 has 16 divisors (see below), whose sum is σ = 200936298752. Its totient is φ = 64586667168.

The previous prime is 122445556771. The next prime is 122445556799. The reversal of 122445556779 is 977655544221.

It is a happy number.

It is not a de Polignac number, because 122445556779 - 2³ = 122445556771 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122445556771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224258989 + ... + 224259534.

It is an arithmetic number, because the mean of its divisors is an integer number (12558518672).

Almost surely, 2^122445556779 is an apocalyptic number.

122445556779 is a deficient number, since it is larger than the sum of its proper divisors (78490741973).

122445556779 is a wasteful number, since it uses less digits than its factorization.

122445556779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448518546.

The product of its digits is 21168000, while the sum is 57.

The spelling of 122445556779 in words is "one hundred twenty-two billion, four hundred forty-five million, five hundred fifty-six thousand, seven hundred seventy-nine".