128169211552 has 24 divisors (see below), whose sum is σ = 255789758196. Its totient is φ = 63206733312.

The previous prime is 128169211543. The next prime is 128169211553. The reversal of 128169211552 is 255112961821.

It can be written as a sum of positive squares in 2 ways, for example, as 113971059216 + 14198152336 = 337596^2 + 119156^2 .

It is a super-2 number, since 2×128169211552² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128169211499 and 128169211508.

It is not an unprimeable number, because it can be changed into a prime (128169211553) 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 3 ways as a sum of consecutive naturals, for example, 27431143 + ... + 27435814.

Almost surely, 2^128169211552 is an apocalyptic number.

It is an amenable number.

128169211552 is a deficient number, since it is larger than the sum of its proper divisors (127620546644).

128169211552 is an equidigital number, since it uses as much as digits as its factorization.

128169211552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54867040 (or 54867032 counting only the distinct ones).

The product of its digits is 86400, while the sum is 43.

The spelling of 128169211552 in words is "one hundred twenty-eight billion, one hundred sixty-nine million, two hundred eleven thousand, five hundred fifty-two".