128187194480 has 20 divisors (see below), whose sum is σ = 298035227352. Its totient is φ = 51274877760.

The previous prime is 128187194461. The next prime is 128187194491. The reversal of 128187194480 is 84491781821.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 801169886 + ... + 801170045.

Almost surely, 2^128187194480 is an apocalyptic number.

128187194480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128187194480 is an abundant number, since it is smaller than the sum of its proper divisors (169848032872).

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

128187194480 is a wasteful number, since it uses less digits than its factorization.

128187194480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602339944 (or 1602339938 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 128187194480 in words is "one hundred twenty-eight billion, one hundred eighty-seven million, one hundred ninety-four thousand, four hundred eighty".