421321662560 has 24 divisors (see below), whose sum is σ = 995372428176. Its totient is φ = 168528664960.

The previous prime is 421321662527. The next prime is 421321662581. The reversal of 421321662560 is 65266123124.

It is a congruent 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, 1316630036 + ... + 1316630355.

It is an arithmetic number, because the mean of its divisors is an integer number (41473851174).

Almost surely, 2^421321662560 is an apocalyptic number.

421321662560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421321662560 is an abundant number, since it is smaller than the sum of its proper divisors (574050765616).

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

421321662560 is a wasteful number, since it uses less digits than its factorization.

421321662560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633260406 (or 2633260398 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 421321662560 its reverse (65266123124), we get a palindrome (486587785684).

The spelling of 421321662560 in words is "four hundred twenty-one billion, three hundred twenty-one million, six hundred sixty-two thousand, five hundred sixty".