1811606273256 has 128 divisors (see below), whose sum is σ = 4958710122240. Its totient is φ = 548129894400.

The previous prime is 1811606273237. The next prime is 1811606273261. The reversal of 1811606273256 is 6523726061181.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84167776 + ... + 84189296.

It is an arithmetic number, because the mean of its divisors is an integer number (38739922830).

Almost surely, 2^{1811606273256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1811606273256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2479355061120).

1811606273256 is an abundant number, since it is smaller than the sum of its proper divisors (3147103848984).

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

1811606273256 is a wasteful number, since it uses less digits than its factorization.

1811606273256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26027 (or 26023 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1811606273256 in words is "one trillion, eight hundred eleven billion, six hundred six million, two hundred seventy-three thousand, two hundred fifty-six".