1123820812044 has 144 divisors (see below), whose sum is σ = 3279033139200. Its totient is φ = 317893984128.

The previous prime is 1123820811973. The next prime is 1123820812129. The reversal of 1123820812044 is 4402180283211.

1123820812044 is a `hidden beast` number, since 11 + 238 + 208 + 1 + 204 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15293262 + ... + 15366570.

Almost surely, 2^{1123820812044} is an apocalyptic number.

1123820812044 is a gapful number since it is divisible by the number (14) 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 1123820812044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639516569600).

1123820812044 is an abundant number, since it is smaller than the sum of its proper divisors (2155212327156).

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

1123820812044 is a wasteful number, since it uses less digits than its factorization.

1123820812044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73932 (or 73927 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The spelling of 1123820812044 in words is "one trillion, one hundred twenty-three billion, eight hundred twenty million, eight hundred twelve thousand, forty-four".