128355475873833 has 24 divisors (see below), whose sum is σ = 205060399901448. Its totient is φ = 76853174740992.

The previous prime is 128355475873831. The next prime is 128355475873843. The reversal of 128355475873833 is 338378574553821.

128355475873833 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 5 + 5 + 4 + 7 + 587 + 3 + 8 + 33 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17992298843289 + 110363177030544 = 4241733^2 + 10505388^2 .

It is not a de Polignac number, because 128355475873833 - 2¹ = 128355475873831 is a prime.

It is a super-2 number, since 2×128355475873833² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128355475873831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14825067960 + ... + 14825076617.

It is an arithmetic number, because the mean of its divisors is an integer number (8544183329227).

Almost surely, 2^{128355475873833} is an apocalyptic number.

128355475873833 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128355475873833 is a deficient number, since it is larger than the sum of its proper divisors (76704924027615).

128355475873833 is a wasteful number, since it uses less digits than its factorization.

128355475873833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29650144633 (or 29650144630 counting only the distinct ones).

The product of its digits is 2032128000, while the sum is 72.

The spelling of 128355475873833 in words is "one hundred twenty-eight trillion, three hundred fifty-five billion, four hundred seventy-five million, eight hundred seventy-three thousand, eight hundred thirty-three".