128154257608 has 32 divisors (see below), whose sum is σ = 265766893560. Its totient is φ = 57549519360.

The previous prime is 128154257603. The next prime is 128154257629. The reversal of 128154257608 is 806752451821.

It can be written as a sum of positive squares in 4 ways, for example, as 120782661444 + 7371596164 = 347538^2 + 85858^2 .

It is not an unprimeable number, because it can be changed into a prime (128154257603) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16648213 + ... + 16655908.

Almost surely, 2^128154257608 is an apocalyptic number.

It is an amenable number.

128154257608 is an abundant number, since it is smaller than the sum of its proper divisors (137612635952).

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

128154257608 is a wasteful number, since it uses less digits than its factorization.

128154257608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33304177 (or 33304173 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 128154257608 in words is "one hundred twenty-eight billion, one hundred fifty-four million, two hundred fifty-seven thousand, six hundred eight".