243453954780 has 360 divisors, whose sum is σ = 793177052976. Its totient is φ = 62507427840.

The previous prime is 243453954727. The next prime is 243453954827. The reversal of 243453954780 is 87459354342.

243453954780 is a `hidden beast` number, since 2 + 4 + 34 + 53 + 95 + 478 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 549557239 + ... + 549557681.

Almost surely, 2^243453954780 is an apocalyptic number.

243453954780 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 243453954780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396588526488).

243453954780 is an abundant number, since it is smaller than the sum of its proper divisors (549723098196).

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

243453954780 is a wasteful number, since it uses less digits than its factorization.

243453954780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 54.

The spelling of 243453954780 in words is "two hundred forty-three billion, four hundred fifty-three million, nine hundred fifty-four thousand, seven hundred eighty".