420507608565 has 32 divisors (see below), whose sum is σ = 749593460736. Its totient is φ = 199544548160.

The previous prime is 420507608561. The next prime is 420507608641. The reversal of 420507608565 is 565806705024.

It is a happy number.

It is not a de Polignac number, because 420507608565 - 2² = 420507608561 is a prime.

It is a super-2 number, since 2×420507608565² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420507608561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27104277 + ... + 27119786.

It is an arithmetic number, because the mean of its divisors is an integer number (23424795648).

Almost surely, 2^420507608565 is an apocalyptic number.

It is an amenable number.

420507608565 is a deficient number, since it is larger than the sum of its proper divisors (329085852171).

420507608565 is a wasteful number, since it uses less digits than its factorization.

420507608565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54224129.

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 420507608565 in words is "four hundred twenty billion, five hundred seven million, six hundred eight thousand, five hundred sixty-five".