1812159162000 has 1280 divisors, whose sum is σ = 7521690009600. Its totient is φ = 415876032000.

The previous prime is 1812159161993. The next prime is 1812159162041. The reversal of 1812159162000 is 2619512181.

1812159162000 is a `hidden beast` number, since 1 + 8 + 1 + 2 + 1 + 591 + 62 + 0 + 0 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1365605337 + ... + 1365606663.

It is an arithmetic number, because the mean of its divisors is an integer number (5876320320).

Almost surely, 2^{1812159162000} is an apocalyptic number.

1812159162000 is a gapful number since it is divisible by the number (10) 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 1812159162000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3760845004800).

1812159162000 is an abundant number, since it is smaller than the sum of its proper divisors (5709530847600).

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

1812159162000 is a wasteful number, since it uses less digits than its factorization.

1812159162000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The spelling of 1812159162000 in words is "one trillion, eight hundred twelve billion, one hundred fifty-nine million, one hundred sixty-two thousand".