122857934679 has 16 divisors (see below), whose sum is σ = 183712803840. Its totient is φ = 81139817880.

The previous prime is 122857934669. The next prime is 122857934681. The reversal of 122857934679 is 976439758221.

122857934679 is a `hidden beast` number, since 1 + 2 + 2 + 85 + 7 + 93 + 467 + 9 = 666.

It is not a de Polignac number, because 122857934679 - 2⁹ = 122857934167 is a prime.

It is a super-2 number, since 2×122857934679² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122857934629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21260167 + ... + 21265944.

It is an arithmetic number, because the mean of its divisors is an integer number (11482050240).

Almost surely, 2^122857934679 is an apocalyptic number.

122857934679 is a deficient number, since it is larger than the sum of its proper divisors (60854869161).

122857934679 is a wasteful number, since it uses less digits than its factorization.

122857934679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42526227 (or 42526221 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 122857934679 in words is "one hundred twenty-two billion, eight hundred fifty-seven million, nine hundred thirty-four thousand, six hundred seventy-nine".