420550351252520 has 32 divisors (see below), whose sum is σ = 961750393443720. Its totient is φ = 165462433278720.

The previous prime is 420550351252519. The next prime is 420550351252543. The reversal of 420550351252520 is 25252153055024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 282375827537764 + 138174523714756 = 16804042^2 + 11754766^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86178348227 + ... + 86178353106.

Almost surely, 2^{420550351252520} is an apocalyptic number.

420550351252520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420550351252520 is an abundant number, since it is smaller than the sum of its proper divisors (541200042191200).

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

420550351252520 is a wasteful number, since it uses less digits than its factorization.

420550351252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172356701405 (or 172356701401 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 41.

The spelling of 420550351252520 in words is "four hundred twenty trillion, five hundred fifty billion, three hundred fifty-one million, two hundred fifty-two thousand, five hundred twenty".