1800051664320 has 3584 divisors, whose sum is σ = 8914010112000. Its totient is φ = 333056655360.

The previous prime is 1800051664319. The next prime is 1800051664331. The reversal of 1800051664320 is 234661500081.

It is a happy number.

1800051664320 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 0 + 5 + 1 + 6 + 643 + 2 + 0 = 666.

It is a super-2 number, since 2×1800051664320² (a number of 25 digits) contains 22 as substring.

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 511 ways as a sum of consecutive naturals, for example, 58066182705 + ... + 58066182735.

It is an arithmetic number, because the mean of its divisors is an integer number (2487168000).

Almost surely, 2^{1800051664320} is an apocalyptic number.

1800051664320 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 1800051664320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4457005056000).

1800051664320 is an abundant number, since it is smaller than the sum of its proper divisors (7113958447680).

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

1800051664320 is a wasteful number, since it uses less digits than its factorization.

1800051664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1800051664320 in words is "one trillion, eight hundred billion, fifty-one million, six hundred sixty-four thousand, three hundred twenty".