122698781856 has 480 divisors, whose sum is σ = 444748993920. Its totient is φ = 32397926400.

The previous prime is 122698781791. The next prime is 122698781873. The reversal of 122698781856 is 658187896221.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 122698781793 and 122698781802.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14129836 + ... + 14138516.

It is an arithmetic number, because the mean of its divisors is an integer number (926560404).

Almost surely, 2^122698781856 is an apocalyptic number.

122698781856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122698781856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222374496960).

122698781856 is an abundant number, since it is smaller than the sum of its proper divisors (322050212064).

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

122698781856 is a wasteful number, since it uses less digits than its factorization.

122698781856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8770 (or 8753 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The spelling of 122698781856 in words is "one hundred twenty-two billion, six hundred ninety-eight million, seven hundred eighty-one thousand, eight hundred fifty-six".