428413769281 has 2 divisors, whose sum is σ = 428413769282. Its totient is φ = 428413769280.

The previous prime is 428413769239. The next prime is 428413769291. The reversal of 428413769281 is 182967314824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378944892225 + 49468877056 = 615585^2 + 222416^2 .

It is a cyclic number.

It is not a de Polignac number, because 428413769281 - 2³⁵ = 394054030913 is a prime.

It is a super-2 number, since 2×428413769281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428413769291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214206884640 + 214206884641.

It is an arithmetic number, because the mean of its divisors is an integer number (214206884641).

Almost surely, 2^428413769281 is an apocalyptic number.

It is an amenable number.

428413769281 is a deficient number, since it is larger than the sum of its proper divisors (1).

428413769281 is an equidigital number, since it uses as much as digits as its factorization.

428413769281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4644864, while the sum is 55.

The spelling of 428413769281 in words is "four hundred twenty-eight billion, four hundred thirteen million, seven hundred sixty-nine thousand, two hundred eighty-one".