421445325545 has 4 divisors (see below), whose sum is σ = 505734390660. Its totient is φ = 337156260432.

The previous prime is 421445325529. The next prime is 421445325559. The reversal of 421445325545 is 545523544124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281183091289 + 140262234256 = 530267^2 + 374516^2 .

It is a cyclic number.

It is not a de Polignac number, because 421445325545 - 2⁴ = 421445325529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421445325496 and 421445325505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42144532550 + ... + 42144532559.

It is an arithmetic number, because the mean of its divisors is an integer number (126433597665).

Almost surely, 2^421445325545 is an apocalyptic number.

It is an amenable number.

421445325545 is a deficient number, since it is larger than the sum of its proper divisors (84289065115).

421445325545 is an equidigital number, since it uses as much as digits as its factorization.

421445325545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84289065114.

The product of its digits is 1920000, while the sum is 44.

Adding to 421445325545 its reverse (545523544124), we get a palindrome (966968869669).

The spelling of 421445325545 in words is "four hundred twenty-one billion, four hundred forty-five million, three hundred twenty-five thousand, five hundred forty-five".