128146158267555 has 64 divisors (see below), whose sum is σ = 206086386654720. Its totient is φ = 67994734639104.

The previous prime is 128146158267553. The next prime is 128146158267563. The reversal of 128146158267555 is 555762851641821.

It is a happy number.

It is a Cunningham number, because it is equal to 11320166²-1.

It is not a de Polignac number, because 128146158267555 - 2¹ = 128146158267553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128146158267553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11444681217 + ... + 11444692413.

It is an arithmetic number, because the mean of its divisors is an integer number (3220099791480).

Almost surely, 2^{128146158267555} is an apocalyptic number.

128146158267555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128146158267555 is a deficient number, since it is larger than the sum of its proper divisors (77940228387165).

128146158267555 is a wasteful number, since it uses less digits than its factorization.

128146158267555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16228.

The product of its digits is 161280000, while the sum is 66.

The spelling of 128146158267555 in words is "one hundred twenty-eight trillion, one hundred forty-six billion, one hundred fifty-eight million, two hundred sixty-seven thousand, five hundred fifty-five".