128355735019 has 4 divisors (see below), whose sum is σ = 135111300040. Its totient is φ = 121600170000.

The previous prime is 128355734993. The next prime is 128355735023. The reversal of 128355735019 is 910537553821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128355735019 is a prime.

It is a super-2 number, since 2×128355735019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128355735029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3377782482 + ... + 3377782519.

It is an arithmetic number, because the mean of its divisors is an integer number (33777825010).

Almost surely, 2^128355735019 is an apocalyptic number.

128355735019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128355735019 is a deficient number, since it is larger than the sum of its proper divisors (6755565021).

128355735019 is an equidigital number, since it uses as much as digits as its factorization.

128355735019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6755565020.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 128355735019 in words is "one hundred twenty-eight billion, three hundred fifty-five million, seven hundred thirty-five thousand, nineteen".