128638292418 has 24 divisors (see below), whose sum is σ = 278739474156. Its totient is φ = 42875865600.

The previous prime is 128638292401. The next prime is 128638292437. The reversal of 128638292418 is 814292836821.

128638292418 is a `hidden beast` number, since 1 + 2 + 8 + 63 + 82 + 92 + 418 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 110292402609 + 18345889809 = 332103^2 + 135447^2 .

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 11 ways as a sum of consecutive naturals, for example, 69903 + ... + 512018.

Almost surely, 2^128638292418 is an apocalyptic number.

128638292418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128638292418 is an abundant number, since it is smaller than the sum of its proper divisors (150101181738).

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

128638292418 is a wasteful number, since it uses less digits than its factorization.

128638292418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594210 (or 594207 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 128638292418 in words is "one hundred twenty-eight billion, six hundred thirty-eight million, two hundred ninety-two thousand, four hundred eighteen".