1812611196 has 120 divisors (see below), whose sum is σ = 5473557936. Its totient is φ = 516948480.

The previous prime is 1812611149. The next prime is 1812611219. The reversal of 1812611196 is 6911162181.

It is a happy number.

1812611196 is a `hidden beast` number, since 18 + 12 + 611 + 19 + 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 1812611196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45630 + ... + 75546.

Almost surely, 2^1812611196 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 1812611196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2736778968).

1812611196 is an abundant number, since it is smaller than the sum of its proper divisors (3660946740).

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

1812611196 is a wasteful number, since it uses less digits than its factorization.

1812611196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29961 (or 29950 counting only the distinct ones).

The product of its digits is 5184, while the sum is 36.

The square root of 1812611196 is about 42574.7718255776. The cubic root of 1812611196 is about 1219.2746732194.

The spelling of 1812611196 in words is "one billion, eight hundred twelve million, six hundred eleven thousand, one hundred ninety-six".