128052821953 has 12 divisors (see below), whose sum is σ = 149042771220. Its totient is φ = 109698134112.

The previous prime is 128052821951. The next prime is 128052821989. The reversal of 128052821953 is 359128250821.

It can be written as a sum of positive squares in 2 ways, for example, as 85283273089 + 42769548864 = 292033^2 + 206808^2 .

It is not a de Polignac number, because 128052821953 - 2¹ = 128052821951 is a prime.

It is a super-5 number, since 5×128052821953⁵ (a number of 57 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (128052821951) 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, 642726 + ... + 818047.

It is an arithmetic number, because the mean of its divisors is an integer number (12420230935).

Almost surely, 2^128052821953 is an apocalyptic number.

It is an amenable number.

128052821953 is a deficient number, since it is larger than the sum of its proper divisors (20989949267).

128052821953 is a wasteful number, since it uses less digits than its factorization.

128052821953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462576 (or 1462569 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 128052821953 in words is "one hundred twenty-eight billion, fifty-two million, eight hundred twenty-one thousand, nine hundred fifty-three".