243636080400 has 360 divisors, whose sum is σ = 918701239040. Its totient is φ = 59564160000.

The previous prime is 243636080383. The next prime is 243636080411. The reversal of 243636080400 is 4080636342.

It is a happy number.

243636080400 is a `hidden beast` number, since 2 + 4 + 3 + 6 + 3 + 608 + 0 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2062950 + ... + 2177850.

Almost surely, 2^243636080400 is an apocalyptic number.

243636080400 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 243636080400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459350619520).

243636080400 is an abundant number, since it is smaller than the sum of its proper divisors (675065158640).

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

243636080400 is a wasteful number, since it uses less digits than its factorization.

243636080400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114975 (or 114961 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 243636080400 in words is "two hundred forty-three billion, six hundred thirty-six million, eighty thousand, four hundred".