1813461156 has 192 divisors, whose sum is σ = 5376044800. Its totient is φ = 524040192.

The previous prime is 1813461127. The next prime is 1813461187. The reversal of 1813461156 is 6511643181.

It is a happy number.

1813461156 is a `hidden beast` number, since 1 + 8 + 1 + 34 + 611 + 5 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1813461156.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4187916 + ... + 4188348.

Almost surely, 2^1813461156 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 1813461156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2688022400).

1813461156 is an abundant number, since it is smaller than the sum of its proper divisors (3562583644).

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

1813461156 is a wasteful number, since it uses less digits than its factorization.

1813461156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 627 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1813461156 is about 42584.7526234449. The cubic root of 1813461156 is about 1219.4652220368.

The spelling of 1813461156 in words is "one billion, eight hundred thirteen million, four hundred sixty-one thousand, one hundred fifty-six".