1800661060800 has 672 divisors, whose sum is σ = 7517465280000. Its totient is φ = 410720440320.

The previous prime is 1800661060787. The next prime is 1800661060813. The reversal of 1800661060800 is 80601660081.

It is an interprime number because it is at equal distance from previous prime (1800661060787) and next prime (1800661060813).

It is a tau number, because it is divible by the number of its divisors (672).

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 95 ways as a sum of consecutive naturals, for example, 150891634 + ... + 150903566.

Almost surely, 2^{1800661060800} is an apocalyptic number.

1800661060800 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 1800661060800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3758732640000).

1800661060800 is an abundant number, since it is smaller than the sum of its proper divisors (5716804219200).

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

1800661060800 is a wasteful number, since it uses less digits than its factorization.

1800661060800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12470 (or 12449 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 1800661060800 in words is "one trillion, eight hundred billion, six hundred sixty-one million, sixty thousand, eight hundred".