243711426420 has 1728 divisors, whose sum is σ = 1066613184000. Its totient is φ = 44706816000.

The previous prime is 243711426391. The next prime is 243711426451. The reversal of 243711426420 is 24624117342.

243711426420 is a `hidden beast` number, since 2 + 4 + 3 + 7 + 1 + 1 + 4 + 2 + 642 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 2412984370 + ... + 2412984470.

It is an arithmetic number, because the mean of its divisors is an integer number (617253000).

Almost surely, 2^243711426420 is an apocalyptic number.

243711426420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243711426420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533306592000).

243711426420 is an abundant number, since it is smaller than the sum of its proper divisors (822901757580).

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

243711426420 is a wasteful number, since it uses less digits than its factorization.

243711426420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 243711426420 in words is "two hundred forty-three billion, seven hundred eleven million, four hundred twenty-six thousand, four hundred twenty".