18128701648 has 20 divisors (see below), whose sum is σ = 36973010560. Its totient is φ = 8587279584.

The previous prime is 18128701627. The next prime is 18128701651. The reversal of 18128701648 is 84610782181.

It is a junction number, because it is equal to n+sod(n) for n = 18128701598 and 18128701607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29816640 + ... + 29817247.

It is an arithmetic number, because the mean of its divisors is an integer number (1848650528).

Almost surely, 2^18128701648 is an apocalyptic number.

It is an amenable number.

18128701648 is an abundant number, since it is smaller than the sum of its proper divisors (18844308912).

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

18128701648 is a wasteful number, since it uses less digits than its factorization.

18128701648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59633914 (or 59633908 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 18128701648 in words is "eighteen billion, one hundred twenty-eight million, seven hundred one thousand, six hundred forty-eight".