428752670681 has 2 divisors, whose sum is σ = 428752670682. Its totient is φ = 428752670680.

The previous prime is 428752670623. The next prime is 428752670693. The reversal of 428752670681 is 186076257824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424733744656 + 4018926025 = 651716^2 + 63395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428752670681 is a prime.

It is a super-2 number, since 2×428752670681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428752670611) 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, 214376335340 + 214376335341.

It is an arithmetic number, because the mean of its divisors is an integer number (214376335341).

Almost surely, 2^428752670681 is an apocalyptic number.

It is an amenable number.

428752670681 is a deficient number, since it is larger than the sum of its proper divisors (1).

428752670681 is an equidigital number, since it uses as much as digits as its factorization.

428752670681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 428752670681 in words is "four hundred twenty-eight billion, seven hundred fifty-two million, six hundred seventy thousand, six hundred eighty-one".