421320266544 has 20 divisors (see below), whose sum is σ = 1088410688696. Its totient is φ = 140440088832.

The previous prime is 421320266539. The next prime is 421320266561. The reversal of 421320266544 is 445662023124.

It is a happy number.

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, 4388752729 + ... + 4388752824.

Almost surely, 2^421320266544 is an apocalyptic number.

It is an amenable number.

421320266544 is an abundant number, since it is smaller than the sum of its proper divisors (667090422152).

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

421320266544 is a wasteful number, since it uses less digits than its factorization.

421320266544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8777505564 (or 8777505558 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 421320266544 its reverse (445662023124), we get a palindrome (866982289668).

The spelling of 421320266544 in words is "four hundred twenty-one billion, three hundred twenty million, two hundred sixty-six thousand, five hundred forty-four".