420443531155545 has 16 divisors (see below), whose sum is σ = 672719855287680. Its totient is φ = 224233148136704.

The previous prime is 420443531155519. The next prime is 420443531155547. The reversal of 420443531155545 is 545551135344024.

It is a cyclic number.

It is not a de Polignac number, because 420443531155545 - 2⁶ = 420443531155481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420443531155547) 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 in 15 ways as a sum of consecutive naturals, for example, 211591440 + ... + 213569249.

It is an arithmetic number, because the mean of its divisors is an integer number (42044990955480).

Almost surely, 2^{420443531155545} is an apocalyptic number.

It is an amenable number.

420443531155545 is a deficient number, since it is larger than the sum of its proper divisors (252276324132135).

420443531155545 is a wasteful number, since it uses less digits than its factorization.

420443531155545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425226624.

The product of its (nonzero) digits is 14400000, while the sum is 51.

Adding to 420443531155545 its reverse (545551135344024), we get a palindrome (965994666499569).

The spelling of 420443531155545 in words is "four hundred twenty trillion, four hundred forty-three billion, five hundred thirty-one million, one hundred fifty-five thousand, five hundred forty-five".