420356577257 has 2 divisors, whose sum is σ = 420356577258. Its totient is φ = 420356577256.

The previous prime is 420356577161. The next prime is 420356577271. The reversal of 420356577257 is 752775653024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291372164521 + 128984412736 = 539789^2 + 359144^2 .

It is a cyclic number.

It is not a de Polignac number, because 420356577257 - 2⁸ = 420356577001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420356577199 and 420356577208.

It is not a weakly prime, because it can be changed into another prime (420356577287) 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, 210178288628 + 210178288629.

It is an arithmetic number, because the mean of its divisors is an integer number (210178288629).

Almost surely, 2^420356577257 is an apocalyptic number.

It is an amenable number.

420356577257 is a deficient number, since it is larger than the sum of its proper divisors (1).

420356577257 is an equidigital number, since it uses as much as digits as its factorization.

420356577257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12348000, while the sum is 53.

The spelling of 420356577257 in words is "four hundred twenty billion, three hundred fifty-six million, five hundred seventy-seven thousand, two hundred fifty-seven".