128669513436738 has 16 divisors (see below), whose sum is σ = 285932252081760. Its totient is φ = 42889837812228.

The previous prime is 128669513436727. The next prime is 128669513436743. The reversal of 128669513436738 is 837634315966821.

It is a happy number.

128669513436738 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 6 + 9 + 513 + 4 + 36 + 73 + 8 = 666.

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 7 ways as a sum of consecutive naturals, for example, 1191384383620 + ... + 1191384383727.

It is an arithmetic number, because the mean of its divisors is an integer number (17870765755110).

Almost surely, 2^{128669513436738} is an apocalyptic number.

128669513436738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128669513436738 is an abundant number, since it is smaller than the sum of its proper divisors (157262738645022).

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

128669513436738 is a wasteful number, since it uses less digits than its factorization.

128669513436738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382768767358 (or 2382768767352 counting only the distinct ones).

The product of its digits is 940584960, while the sum is 72.

The spelling of 128669513436738 in words is "one hundred twenty-eight trillion, six hundred sixty-nine billion, five hundred thirteen million, four hundred thirty-six thousand, seven hundred thirty-eight".