3618661105122 has 128 divisors (see below), whose sum is σ = 9018535680000. Its totient is φ = 944477356032.

The previous prime is 3618661105091. The next prime is 3618661105123. The reversal of 3618661105122 is 2215011668163.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (3618661105123) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 17694529 + ... + 17897867.

It is an arithmetic number, because the mean of its divisors is an integer number (70457310000).

Almost surely, 2^{3618661105122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3618661105122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4509267840000).

3618661105122 is an abundant number, since it is smaller than the sum of its proper divisors (5399874574878).

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

3618661105122 is a wasteful number, since it uses less digits than its factorization.

3618661105122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204168.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 3618661105122 in words is "three trillion, six hundred eighteen billion, six hundred sixty-one million, one hundred five thousand, one hundred twenty-two".