428631464136787 has 2 divisors, whose sum is σ = 428631464136788. Its totient is φ = 428631464136786.

The previous prime is 428631464136773. The next prime is 428631464136907. The reversal of 428631464136787 is 787631464136824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428631464136787 is a prime.

It is not a weakly prime, because it can be changed into another prime (428631464136727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214315732068393 + 214315732068394.

It is an arithmetic number, because the mean of its divisors is an integer number (214315732068394).

Almost surely, 2^{428631464136787} is an apocalyptic number.

428631464136787 is a deficient number, since it is larger than the sum of its proper divisors (1).

428631464136787 is an equidigital number, since it uses as much as digits as its factorization.

428631464136787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 780337152, while the sum is 70.

The spelling of 428631464136787 in words is "four hundred twenty-eight trillion, six hundred thirty-one billion, four hundred sixty-four million, one hundred thirty-six thousand, seven hundred eighty-seven".