128103633961 has 2 divisors, whose sum is σ = 128103633962. Its totient is φ = 128103633960.

The previous prime is 128103633913. The next prime is 128103633967. The reversal of 128103633961 is 169336301821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93969223936 + 34134410025 = 306544^2 + 184755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128103633961 is a prime.

It is not a weakly prime, because it can be changed into another prime (128103633967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64051816980 + 64051816981.

It is an arithmetic number, because the mean of its divisors is an integer number (64051816981).

Almost surely, 2^128103633961 is an apocalyptic number.

It is an amenable number.

128103633961 is a deficient number, since it is larger than the sum of its proper divisors (1).

128103633961 is an equidigital number, since it uses as much as digits as its factorization.

128103633961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 128103633961 in words is "one hundred twenty-eight billion, one hundred three million, six hundred thirty-three thousand, nine hundred sixty-one".