1123604041638 has 32 divisors (see below), whose sum is σ = 2434561710336. Its totient is φ = 343654111008.

The previous prime is 1123604041633. The next prime is 1123604041667. The reversal of 1123604041638 is 8361404063211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1123604041596 and 1123604041605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123604041633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43116256 + ... + 43142307.

It is an arithmetic number, because the mean of its divisors is an integer number (76080053448).

Almost surely, 2^{1123604041638} is an apocalyptic number.

1123604041638 is an abundant number, since it is smaller than the sum of its proper divisors (1310957668698).

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

1123604041638 is a wasteful number, since it uses less digits than its factorization.

1123604041638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86258748.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 1123604041638 in words is "one trillion, one hundred twenty-three billion, six hundred four million, forty-one thousand, six hundred thirty-eight".