128247882857 has 2 divisors, whose sum is σ = 128247882858. Its totient is φ = 128247882856.

The previous prime is 128247882767. The next prime is 128247882923. The reversal of 128247882857 is 758288742821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92088578521 + 36159304336 = 303461^2 + 190156^2 .

It is a cyclic number.

It is not a de Polignac number, because 128247882857 - 2²⁴ = 128231105641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128247882857.

It is not a weakly prime, because it can be changed into another prime (128247882157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64123941428 + 64123941429.

It is an arithmetic number, because the mean of its divisors is an integer number (64123941429).

Almost surely, 2^128247882857 is an apocalyptic number.

It is an amenable number.

128247882857 is a deficient number, since it is larger than the sum of its proper divisors (1).

128247882857 is an equidigital number, since it uses as much as digits as its factorization.

128247882857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32112640, while the sum is 62.

The spelling of 128247882857 in words is "one hundred twenty-eight billion, two hundred forty-seven million, eight hundred eighty-two thousand, eight hundred fifty-seven".