420456155789 has 2 divisors, whose sum is σ = 420456155790. Its totient is φ = 420456155788.

The previous prime is 420456155687. The next prime is 420456155807. The reversal of 420456155789 is 987551654024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267426539689 + 153029616100 = 517133^2 + 391190^2 .

It is a cyclic number.

It is not a de Polignac number, because 420456155789 - 2²⁸ = 420187720333 is a prime.

It is a super-3 number, since 3×420456155789³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420456158789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210228077894 + 210228077895.

It is an arithmetic number, because the mean of its divisors is an integer number (210228077895).

Almost surely, 2^420456155789 is an apocalyptic number.

It is an amenable number.

420456155789 is a deficient number, since it is larger than the sum of its proper divisors (1).

420456155789 is an equidigital number, since it uses as much as digits as its factorization.

420456155789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 420456155789 in words is "four hundred twenty billion, four hundred fifty-six million, one hundred fifty-five thousand, seven hundred eighty-nine".