128103633061 has 4 divisors (see below), whose sum is σ = 131565893452. Its totient is φ = 124641372672.

The previous prime is 128103633037. The next prime is 128103633083. The reversal of 128103633061 is 160336301821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160336301821 = 79631 ⋅2013491.

It can be written as a sum of positive squares in 2 ways, for example, as 92723904036 + 35379729025 = 304506^2 + 188095^2 .

It is a cyclic number.

It is not a de Polignac number, because 128103633061 - 2²⁷ = 127969415333 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 (128103633961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731130140 + ... + 1731130213.

It is an arithmetic number, because the mean of its divisors is an integer number (32891473363).

Almost surely, 2^128103633061 is an apocalyptic number.

It is an amenable number.

128103633061 is a deficient number, since it is larger than the sum of its proper divisors (3462260391).

128103633061 is an equidigital number, since it uses as much as digits as its factorization.

128103633061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462260390.

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 128103633061 its reverse (160336301821), we get a palindrome (288439934882).

The spelling of 128103633061 in words is "one hundred twenty-eight billion, one hundred three million, six hundred thirty-three thousand, sixty-one".