1123205273208 has 640 divisors, whose sum is σ = 3536263526400. Its totient is φ = 331460812800.

The previous prime is 1123205273173. The next prime is 1123205273219. The reversal of 1123205273208 is 8023725023211.

1123205273208 is a `hidden beast` number, since 1 + 1 + 2 + 320 + 5 + 2 + 7 + 320 + 8 = 666.

It is a super-2 number, since 2×1123205273208² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2155863988 + ... + 2155864508.

It is an arithmetic number, because the mean of its divisors is an integer number (5525411760).

Almost surely, 2^{1123205273208} is an apocalyptic number.

1123205273208 is a gapful number since it is divisible by the number (18) 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 1123205273208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768131763200).

1123205273208 is an abundant number, since it is smaller than the sum of its proper divisors (2413058253192).

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

1123205273208 is a wasteful number, since it uses less digits than its factorization.

1123205273208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 1123205273208 in words is "one trillion, one hundred twenty-three billion, two hundred five million, two hundred seventy-three thousand, two hundred eight".