128888975005 has 12 divisors (see below), whose sum is σ = 179918487900. Its totient is φ = 88381011264.

The previous prime is 128888975003. The next prime is 128888975057. The reversal of 128888975005 is 500579888821.

It can be written as a sum of positive squares in 2 ways, for example, as 29359451716 + 99529523289 = 171346^2 + 315483^2 .

It is not a de Polignac number, because 128888975005 - 2¹ = 128888975003 is a prime.

It is a super-2 number, since 2×128888975005² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128888975003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263038480 + ... + 263038969.

It is an arithmetic number, because the mean of its divisors is an integer number (14993207325).

Almost surely, 2^128888975005 is an apocalyptic number.

It is an amenable number.

128888975005 is a deficient number, since it is larger than the sum of its proper divisors (51029512895).

128888975005 is an equidigital number, since it uses as much as digits as its factorization.

128888975005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526077468 (or 526077461 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 61.

The spelling of 128888975005 in words is "one hundred twenty-eight billion, eight hundred eighty-eight million, nine hundred seventy-five thousand, five".