994128505441 has 2 divisors, whose sum is σ = 994128505442. Its totient is φ = 994128505440.

The previous prime is 994128505411. The next prime is 994128505453. The reversal of 994128505441 is 144505821499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991169580625 + 2958924816 = 995575^2 + 54396^2 .

It is a cyclic number.

It is not a de Polignac number, because 994128505441 - 2¹⁹ = 994127981153 is a prime.

It is not a weakly prime, because it can be changed into another prime (994128505411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497064252720 + 497064252721.

It is an arithmetic number, because the mean of its divisors is an integer number (497064252721).

Almost surely, 2^994128505441 is an apocalyptic number.

It is an amenable number.

994128505441 is a deficient number, since it is larger than the sum of its proper divisors (1).

994128505441 is an equidigital number, since it uses as much as digits as its factorization.

994128505441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 994128505441 in words is "nine hundred ninety-four billion, one hundred twenty-eight million, five hundred five thousand, four hundred forty-one".