428646793261 has 2 divisors, whose sum is σ = 428646793262. Its totient is φ = 428646793260.

The previous prime is 428646793249. The next prime is 428646793321. The reversal of 428646793261 is 162397646824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424074464100 + 4572329161 = 651210^2 + 67619^2 .

It is a cyclic number.

It is not a de Polignac number, because 428646793261 - 2¹¹ = 428646791213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428646793196 and 428646793205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428646793061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214323396630 + 214323396631.

It is an arithmetic number, because the mean of its divisors is an integer number (214323396631).

Almost surely, 2^428646793261 is an apocalyptic number.

It is an amenable number.

428646793261 is a deficient number, since it is larger than the sum of its proper divisors (1).

428646793261 is an equidigital number, since it uses as much as digits as its factorization.

428646793261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 58.

The spelling of 428646793261 in words is "four hundred twenty-eight billion, six hundred forty-six million, seven hundred ninety-three thousand, two hundred sixty-one".