18128701647 has 36 divisors (see below), whose sum is σ = 31511558520. Its totient is φ = 10002035232.

The previous prime is 18128701627. The next prime is 18128701651. The reversal of 18128701647 is 74610782181.

It is not a de Polignac number, because 18128701647 - 2⁶ = 18128701583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18128701627) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 695973 + ... + 721550.

It is an arithmetic number, because the mean of its divisors is an integer number (875321070).

Almost surely, 2^18128701647 is an apocalyptic number.

18128701647 is a deficient number, since it is larger than the sum of its proper divisors (13382856873).

18128701647 is a wasteful number, since it uses less digits than its factorization.

18128701647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417572 (or 1417562 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 18128701647 in words is "eighteen billion, one hundred twenty-eight million, seven hundred one thousand, six hundred forty-seven".