1818709200000 has 2112 divisors, whose sum is σ = 8469251058240. Its totient is φ = 377913600000.

The previous prime is 1818709199969. The next prime is 1818709200019. The reversal of 1818709200000 is 29078181.

It is a tau number, because it is divible by the number of its divisors (2112).

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

It is an unprimeable number.

It is a polite number, since it can be written in 263 ways as a sum of consecutive naturals, for example, 165337199995 + ... + 165337200005.

Almost surely, 2^{1818709200000} is an apocalyptic number.

1818709200000 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 1818709200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4234625529120).

1818709200000 is an abundant number, since it is smaller than the sum of its proper divisors (6650541858240).

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

1818709200000 is an frugal number, since it uses more digits than its factorization.

1818709200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 1818709200000 in words is "one trillion, eight hundred eighteen billion, seven hundred nine million, two hundred thousand".