243874791972 has 36 divisors (see below), whose sum is σ = 704527177536. Its totient is φ = 69678511920.

The previous prime is 243874791971. The next prime is 243874791997. The reversal of 243874791972 is 279197478342.

243874791972 is a `hidden beast` number, since 2 + 4 + 3 + 87 + 479 + 19 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (243874791971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 483878304 + ... + 483878807.

It is an arithmetic number, because the mean of its divisors is an integer number (19570199376).

Almost surely, 2^243874791972 is an apocalyptic number.

It is an amenable number.

243874791972 is an abundant number, since it is smaller than the sum of its proper divisors (460652385564).

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

243874791972 is a wasteful number, since it uses less digits than its factorization.

243874791972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967757128 (or 967757123 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The spelling of 243874791972 in words is "two hundred forty-three billion, eight hundred seventy-four million, seven hundred ninety-one thousand, nine hundred seventy-two".