420220544333545 has 4 divisors (see below), whose sum is σ = 504264653200260. Its totient is φ = 336176435466832.

The previous prime is 420220544333519. The next prime is 420220544333599. The reversal of 420220544333545 is 545333445022024.

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 144087181191424 + 276133363142121 = 12003632^2 + 16617261^2 .

It is a cyclic number.

It is not a de Polignac number, because 420220544333545 - 2³¹ = 420218396849897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420220544333495 and 420220544333504.

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, 42022054433350 + ... + 42022054433359.

It is an arithmetic number, because the mean of its divisors is an integer number (126066163300065).

Almost surely, 2^{420220544333545} is an apocalyptic number.

It is an amenable number.

420220544333545 is a deficient number, since it is larger than the sum of its proper divisors (84044108866715).

420220544333545 is an equidigital number, since it uses as much as digits as its factorization.

420220544333545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84044108866714.

The product of its (nonzero) digits is 6912000, while the sum is 46.

Adding to 420220544333545 its reverse (545333445022024), we get a palindrome (965553989355569).

The spelling of 420220544333545 in words is "four hundred twenty trillion, two hundred twenty billion, five hundred forty-four million, three hundred thirty-three thousand, five hundred forty-five".