1801720514880 has 3584 divisors, whose sum is σ = 8494527283200. Its totient is φ = 352545177600.

The previous prime is 1801720514843. The next prime is 1801720514939. The reversal of 1801720514880 is 884150271081.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 25376345245 + ... + 25376345315.

It is an arithmetic number, because the mean of its divisors is an integer number (2370124800).

Almost surely, 2^{1801720514880} is an apocalyptic number.

1801720514880 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 1801720514880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4247263641600).

1801720514880 is an abundant number, since it is smaller than the sum of its proper divisors (6692806768320).

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

1801720514880 is a wasteful number, since it uses less digits than its factorization.

1801720514880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The spelling of 1801720514880 in words is "one trillion, eight hundred one billion, seven hundred twenty million, five hundred fourteen thousand, eight hundred eighty".