128853975077 has 4 divisors (see below), whose sum is σ = 129388639116. Its totient is φ = 128319311040.

The previous prime is 128853975007. The next prime is 128853975113. The reversal of 128853975077 is 770579358821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54286204036 + 74567771041 = 232994^2 + 273071^2 .

It is a cyclic number.

It is not a de Polignac number, because 128853975077 - 2²⁴ = 128837197861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128853975007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267331658 + ... + 267332139.

It is an arithmetic number, because the mean of its divisors is an integer number (32347159779).

Almost surely, 2^128853975077 is an apocalyptic number.

It is an amenable number.

128853975077 is a deficient number, since it is larger than the sum of its proper divisors (534664039).

128853975077 is an equidigital number, since it uses as much as digits as its factorization.

128853975077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534664038.

The product of its (nonzero) digits is 29635200, while the sum is 62.

The spelling of 128853975077 in words is "one hundred twenty-eight billion, eight hundred fifty-three million, nine hundred seventy-five thousand, seventy-seven".