428106081961 has 2 divisors, whose sum is σ = 428106081962. Its totient is φ = 428106081960.

The previous prime is 428106081943. The next prime is 428106081973. The reversal of 428106081961 is 169180601824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256000581225 + 172105500736 = 505965^2 + 414856^2 .

It is a cyclic number.

It is not a de Polignac number, because 428106081961 - 2¹⁵ = 428106049193 is a prime.

It is not a weakly prime, because it can be changed into another prime (428106081901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214053040980 + 214053040981.

It is an arithmetic number, because the mean of its divisors is an integer number (214053040981).

Almost surely, 2^428106081961 is an apocalyptic number.

It is an amenable number.

428106081961 is a deficient number, since it is larger than the sum of its proper divisors (1).

428106081961 is an equidigital number, since it uses as much as digits as its factorization.

428106081961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 428106081961 in words is "four hundred twenty-eight billion, one hundred six million, eighty-one thousand, nine hundred sixty-one".