421036564457 has 2 divisors, whose sum is σ = 421036564458. Its totient is φ = 421036564456.

The previous prime is 421036564451. The next prime is 421036564499. The reversal of 421036564457 is 754465630124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388850769241 + 32185795216 = 623579^2 + 179404^2 .

It is a cyclic number.

It is not a de Polignac number, because 421036564457 - 2²⁴ = 421019787241 is a prime.

It is not a weakly prime, because it can be changed into another prime (421036564451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210518282228 + 210518282229.

It is an arithmetic number, because the mean of its divisors is an integer number (210518282229).

Almost surely, 2^421036564457 is an apocalyptic number.

It is an amenable number.

421036564457 is a deficient number, since it is larger than the sum of its proper divisors (1).

421036564457 is an equidigital number, since it uses as much as digits as its factorization.

421036564457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 421036564457 in words is "four hundred twenty-one billion, thirty-six million, five hundred sixty-four thousand, four hundred fifty-seven".