423540640000 has 135 divisors (see below), whose sum is σ = 1057095079887. Its totient is φ = 169312128000.

The previous prime is 423540639979. The next prime is 423540640001. The reversal of 423540640000 is 46045324.

The square root of 423540640000 is 650800.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 33205586176 + 390335053824 = 182224^2 + 624768^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423540640001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 260319187 + ... + 260320813.

Almost surely, 2^423540640000 is an apocalyptic number.

423540640000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

423540640000 is the 650800-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423540640000

423540640000 is an abundant number, since it is smaller than the sum of its proper divisors (633554439887).

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

423540640000 is an frugal number, since it uses more digits than its factorization.

423540640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3290 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 423540640000 its reverse (46045324), we get a palindrome (423586685324).

The spelling of 423540640000 in words is "four hundred twenty-three billion, five hundred forty million, six hundred forty thousand".