1813356874332 has 96 divisors (see below), whose sum is σ = 4806937175040. Its totient is φ = 590899881600.

The previous prime is 1813356874319. The next prime is 1813356874337. The reversal of 1813356874332 is 2334786533181.

1813356874332 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 3 + 568 + 7 + 43 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813356874337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4141707 + ... + 4558557.

It is an arithmetic number, because the mean of its divisors is an integer number (50072262240).

Almost surely, 2^{1813356874332} is an apocalyptic number.

1813356874332 is a gapful number since it is divisible by the number (12) 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 1813356874332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403468587520).

1813356874332 is an abundant number, since it is smaller than the sum of its proper divisors (2993580300708).

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

1813356874332 is a wasteful number, since it uses less digits than its factorization.

1813356874332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417768 (or 417760 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 1813356874332 in words is "one trillion, eight hundred thirteen billion, three hundred fifty-six million, eight hundred seventy-four thousand, three hundred thirty-two".