420205503550 has 96 divisors (see below), whose sum is σ = 926374547520. Its totient is φ = 138750796800.

The previous prime is 420205503467. The next prime is 420205503589. The reversal of 420205503550 is 55305502024.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3977410 + ... + 4081690.

It is an arithmetic number, because the mean of its divisors is an integer number (9649734870).

Almost surely, 2^420205503550 is an apocalyptic number.

420205503550 is an abundant number, since it is smaller than the sum of its proper divisors (506169043970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420205503550 is a wasteful number, since it uses less digits than its factorization.

420205503550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104726 (or 104721 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 31.

The spelling of 420205503550 in words is "four hundred twenty billion, two hundred five million, five hundred three thousand, five hundred fifty".