18125485644 has 48 divisors (see below), whose sum is σ = 48535241216. Its totient is φ = 5157216000.

The previous prime is 18125485597. The next prime is 18125485673. The reversal of 18125485644 is 44658452181.

It is a junction number, because it is equal to n+sod(n) for n = 18125485593 and 18125485602.

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 15 ways as a sum of consecutive naturals, for example, 427432 + ... + 467919.

Almost surely, 2^18125485644 is an apocalyptic number.

18125485644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18125485644 is an abundant number, since it is smaller than the sum of its proper divisors (30409755572).

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

18125485644 is a wasteful number, since it uses less digits than its factorization.

18125485644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895606 (or 895604 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The spelling of 18125485644 in words is "eighteen billion, one hundred twenty-five million, four hundred eighty-five thousand, six hundred forty-four".