122278455678 has 32 divisors (see below), whose sum is σ = 265258294560. Its totient is φ = 37426211840.

The previous prime is 122278455671. The next prime is 122278455707. The reversal of 122278455678 is 876554872221.

It is a super-2 number, since 2×122278455678² (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 (122278455671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14615433 + ... + 14623796.

It is an arithmetic number, because the mean of its divisors is an integer number (8289321705).

Almost surely, 2^122278455678 is an apocalyptic number.

122278455678 is an abundant number, since it is smaller than the sum of its proper divisors (142979838882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122278455678 is a wasteful number, since it uses less digits than its factorization.

122278455678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29239292.

The product of its digits is 15052800, while the sum is 57.

The spelling of 122278455678 in words is "one hundred twenty-two billion, two hundred seventy-eight million, four hundred fifty-five thousand, six hundred seventy-eight".