1813293855396 has 243 divisors, whose sum is σ = 4859490562563. Its totient is φ = 570090648960.

The previous prime is 1813293855323. The next prime is 1813293855403. The reversal of 1813293855396 is 6935583923181.

It is a happy number.

The square root of 1813293855396 is 1346586.

It is a perfect power (a square), and thus also a powerful number.

1813293855396 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 2 + 93 + 8 + 5 + 539 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 91739928996 + 1721553926400 = 302886^2 + 1312080^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 16635723390 + ... + 16635723498.

Almost surely, 2^{1813293855396} is an apocalyptic number.

1813293855396 is the 1346586-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813293855396

1813293855396 is an abundant number, since it is smaller than the sum of its proper divisors (3046196707167).

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

1813293855396 is a wasteful number, since it uses less digits than its factorization.

1813293855396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 214 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 63.

The spelling of 1813293855396 in words is "one trillion, eight hundred thirteen billion, two hundred ninety-three million, eight hundred fifty-five thousand, three hundred ninety-six".