428905032161 has 2 divisors, whose sum is σ = 428905032162. Its totient is φ = 428905032160.

The previous prime is 428905032139. The next prime is 428905032233. The reversal of 428905032161 is 161230509824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372489281761 + 56415750400 = 610319^2 + 237520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428905032161 is a prime.

It is a super-2 number, since 2×428905032161² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428905032761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214452516080 + 214452516081.

It is an arithmetic number, because the mean of its divisors is an integer number (214452516081).

Almost surely, 2^428905032161 is an apocalyptic number.

It is an amenable number.

428905032161 is a deficient number, since it is larger than the sum of its proper divisors (1).

428905032161 is an equidigital number, since it uses as much as digits as its factorization.

428905032161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 428905032161 in words is "four hundred twenty-eight billion, nine hundred five million, thirty-two thousand, one hundred sixty-one".