128283955993 has 2 divisors, whose sum is σ = 128283955994. Its totient is φ = 128283955992.

The previous prime is 128283955913. The next prime is 128283956011. The reversal of 128283955993 is 399559382821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110587507209 + 17696448784 = 332547^2 + 133028^2 .

It is a cyclic number.

It is not a de Polignac number, because 128283955993 - 2²¹ = 128281858841 is a prime.

It is a super-3 number, since 3×128283955993³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (128283955913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64141977996 + 64141977997.

It is an arithmetic number, because the mean of its divisors is an integer number (64141977997).

Almost surely, 2^128283955993 is an apocalyptic number.

It is an amenable number.

128283955993 is a deficient number, since it is larger than the sum of its proper divisors (1).

128283955993 is an equidigital number, since it uses as much as digits as its factorization.

128283955993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41990400, while the sum is 64.

The spelling of 128283955993 in words is "one hundred twenty-eight billion, two hundred eighty-three million, nine hundred fifty-five thousand, nine hundred ninety-three".