421650340640 has 24 divisors (see below), whose sum is σ = 996148930140. Its totient is φ = 168660136192.

The previous prime is 421650340619. The next prime is 421650340669. The reversal of 421650340640 is 46043056124.

It can be written as a sum of positive squares in 2 ways, for example, as 417269489296 + 4380851344 = 645964^2 + 66188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421650340640.

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, 1317657155 + ... + 1317657474.

Almost surely, 2^421650340640 is an apocalyptic number.

421650340640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421650340640 is an abundant number, since it is smaller than the sum of its proper divisors (574498589500).

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

421650340640 is a wasteful number, since it uses less digits than its factorization.

421650340640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635314644 (or 2635314636 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 421650340640 its reverse (46043056124), we get a palindrome (467693396764).

The spelling of 421650340640 in words is "four hundred twenty-one billion, six hundred fifty million, three hundred forty thousand, six hundred forty".