122297405640 has 128 divisors (see below), whose sum is σ = 386571312000. Its totient is φ = 30866669568.

The previous prime is 122297405639. The next prime is 122297405809. The reversal of 122297405640 is 46504792221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 122297405592 and 122297405601.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 2412232 + ... + 2462408.

It is an arithmetic number, because the mean of its divisors is an integer number (3020088375).

Almost surely, 2^122297405640 is an apocalyptic number.

122297405640 is a gapful number since it is divisible by the number (10) 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 122297405640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193285656000).

122297405640 is an abundant number, since it is smaller than the sum of its proper divisors (264273906360).

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

122297405640 is a wasteful number, since it uses less digits than its factorization.

122297405640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51279 (or 51275 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 122297405640 in words is "one hundred twenty-two billion, two hundred ninety-seven million, four hundred five thousand, six hundred forty".