1128309643829 has 2 divisors, whose sum is σ = 1128309643830. Its totient is φ = 1128309643828.

The previous prime is 1128309643771. The next prime is 1128309643859. The reversal of 1128309643829 is 9283469038211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095402958225 + 32906685604 = 1046615^2 + 181402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128309643829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128309643859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564154821914 + 564154821915.

It is an arithmetic number, because the mean of its divisors is an integer number (564154821915).

Almost surely, 2^{1128309643829} is an apocalyptic number.

It is an amenable number.

1128309643829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128309643829 is an equidigital number, since it uses as much as digits as its factorization.

1128309643829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 1128309643829 in words is "one trillion, one hundred twenty-eight billion, three hundred nine million, six hundred forty-three thousand, eight hundred twenty-nine".