421463525640 has 64 divisors (see below), whose sum is σ = 1264437691200. Its totient is φ = 112386085632.

The previous prime is 421463525611. The next prime is 421463525699. The reversal of 421463525640 is 46525364124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421463525592 and 421463525601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4476571 + ... + 4569749.

It is an arithmetic number, because the mean of its divisors is an integer number (19756838925).

Almost surely, 2^421463525640 is an apocalyptic number.

421463525640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421463525640 is an abundant number, since it is smaller than the sum of its proper divisors (842974165560).

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

421463525640 is a wasteful number, since it uses less digits than its factorization.

421463525640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130886 (or 130882 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 421463525640 its reverse (46525364124), we get a palindrome (467988889764).

The spelling of 421463525640 in words is "four hundred twenty-one billion, four hundred sixty-three million, five hundred twenty-five thousand, six hundred forty".