19128640158 has 32 divisors (see below), whose sum is σ = 42513868800. Its totient is φ = 6375346488.

The previous prime is 19128640147. The next prime is 19128640163. The reversal of 19128640158 is 85104682191.

It is a happy number.

19128640158 is a `hidden beast` number, since 191 + 2 + 8 + 6 + 401 + 58 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469635 + ... + 508737.

It is an arithmetic number, because the mean of its divisors is an integer number (1328558400).

Almost surely, 2^19128640158 is an apocalyptic number.

19128640158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19128640158 is an abundant number, since it is smaller than the sum of its proper divisors (23385228642).

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

19128640158 is a wasteful number, since it uses less digits than its factorization.

19128640158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48173 (or 48167 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 19128640158 in words is "nineteen billion, one hundred twenty-eight million, six hundred forty thousand, one hundred fifty-eight".