18628128475 has 18 divisors (see below), whose sum is σ = 25389681380. Its totient is φ = 13547727600.

The previous prime is 18628128461. The next prime is 18628128481. The reversal of 18628128475 is 57482182681.

It is not a de Polignac number, because 18628128475 - 2⁹ = 18628127963 is a prime.

It is a super-2 number, since 2×18628128475² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3076005 + ... + 3082054.

Almost surely, 2^18628128475 is an apocalyptic number.

18628128475 is a deficient number, since it is larger than the sum of its proper divisors (6761552905).

18628128475 is a wasteful number, since it uses less digits than its factorization.

18628128475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6158091 (or 6158075 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 52.

The spelling of 18628128475 in words is "eighteen billion, six hundred twenty-eight million, one hundred twenty-eight thousand, four hundred seventy-five".