18044619264 has 480 divisors, whose sum is σ = 65830786560. Its totient is φ = 4849238016.

The previous prime is 18044619253. The next prime is 18044619289. The reversal of 18044619264 is 46291644081.

18044619264 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 4 + 619 + 26 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11514609 + ... + 11516175.

It is an arithmetic number, because the mean of its divisors is an integer number (137147472).

Almost surely, 2^18044619264 is an apocalyptic number.

18044619264 is a gapful number since it is divisible by the number (14) 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 18044619264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32915393280).

18044619264 is an abundant number, since it is smaller than the sum of its proper divisors (47786167296).

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

18044619264 is a wasteful number, since it uses less digits than its factorization.

18044619264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18044619264 in words is "eighteen billion, forty-four million, six hundred nineteen thousand, two hundred sixty-four".