18064539648 has 340 divisors, whose sum is σ = 55952637048. Its totient is φ = 5803868160.

The previous prime is 18064539539. The next prime is 18064539653. The reversal of 18064539648 is 84693546081.

18064539648 is a `hidden beast` number, since 1 + 8 + 0 + 64 + 539 + 6 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 18064539594 and 18064539603.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 217645015 + ... + 217645097.

Almost surely, 2^18064539648 is an apocalyptic number.

18064539648 is a gapful number since it is divisible by the number (18) 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 18064539648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27976318524).

18064539648 is an abundant number, since it is smaller than the sum of its proper divisors (37888097400).

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

18064539648 is an frugal number, since it uses more digits than its factorization.

18064539648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

It can be divided in two parts, 1806 and 4539648, that added together give a palindrome (4541454).

The spelling of 18064539648 in words is "eighteen billion, sixty-four million, five hundred thirty-nine thousand, six hundred forty-eight".