18027680399360 has 128 divisors (see below), whose sum is σ = 43322926231800. Its totient is φ = 7201546567680.

The previous prime is 18027680399327. The next prime is 18027680399413. The reversal of 18027680399360 is 6399308672081.

It can be written as a sum of positive squares in 4 ways, for example, as 4888273371136 + 13139407028224 = 2210944^2 + 3624832^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 18027680399293 and 18027680399302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124609946 + ... + 124754534.

Almost surely, 2^{18027680399360} is an apocalyptic number.

18027680399360 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 18027680399360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21661463115900).

18027680399360 is an abundant number, since it is smaller than the sum of its proper divisors (25295245832440).

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

18027680399360 is an frugal number, since it uses more digits than its factorization.

18027680399360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145385 (or 145357 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 18027680399360 in words is "eighteen trillion, twenty-seven billion, six hundred eighty million, three hundred ninety-nine thousand, three hundred sixty".