1808051520840 has 256 divisors, whose sum is σ = 5867849952000. Its totient is φ = 444130283520.

The previous prime is 1808051520823. The next prime is 1808051520851. The reversal of 1808051520840 is 480251508081.

It is a junction number, because it is equal to n+sod(n) for n = 1808051520792 and 1808051520801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 144164970 + ... + 144177510.

It is an arithmetic number, because the mean of its divisors is an integer number (22921288875).

Almost surely, 2^{1808051520840} is an apocalyptic number.

1808051520840 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 1808051520840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2933924976000).

1808051520840 is an abundant number, since it is smaller than the sum of its proper divisors (4059798431160).

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

1808051520840 is a wasteful number, since it uses less digits than its factorization.

1808051520840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14320 (or 14316 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 42.

The spelling of 1808051520840 in words is "one trillion, eight hundred eight billion, fifty-one million, five hundred twenty thousand, eight hundred forty".