128355722205 has 32 divisors (see below), whose sum is σ = 206118321024. Its totient is φ = 68206841856.

The previous prime is 128355722203. The next prime is 128355722207. The reversal of 128355722205 is 502227553821.

It is an interprime number because it is at equal distance from previous prime (128355722203) and next prime (128355722207).

It is not a de Polignac number, because 128355722205 - 2¹ = 128355722203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128355722203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19231749 + ... + 19238421.

It is an arithmetic number, because the mean of its divisors is an integer number (6441197532).

Almost surely, 2^128355722205 is an apocalyptic number.

128355722205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128355722205 is a deficient number, since it is larger than the sum of its proper divisors (77762598819).

128355722205 is a wasteful number, since it uses less digits than its factorization.

128355722205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165.

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 128355722205 in words is "one hundred twenty-eight billion, three hundred fifty-five million, seven hundred twenty-two thousand, two hundred five".