243172040832 has 384 divisors, whose sum is σ = 855536048640. Its totient is φ = 64713129984.

The previous prime is 243172040773. The next prime is 243172040843. The reversal of 243172040832 is 238040271342.

It is a happy number.

243172040832 is a `hidden beast` number, since 243 + 1 + 7 + 2 + 0 + 408 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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 47 ways as a sum of consecutive naturals, for example, 13288393 + ... + 13306679.

It is an arithmetic number, because the mean of its divisors is an integer number (2227958460).

Almost surely, 2^243172040832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243172040832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427768024320).

243172040832 is an abundant number, since it is smaller than the sum of its proper divisors (612364007808).

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

243172040832 is a wasteful number, since it uses less digits than its factorization.

243172040832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428 (or 18413 counting only the distinct ones).

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

The spelling of 243172040832 in words is "two hundred forty-three billion, one hundred seventy-two million, forty thousand, eight hundred thirty-two".