243724752136 has 8 divisors (see below), whose sum is σ = 456983910270. Its totient is φ = 121862376064.

The previous prime is 243724752101. The next prime is 243724752157. The reversal of 243724752136 is 631257427342.

It can be written as a sum of positive squares in only one way, i.e., 173144203236 + 70580548900 = 416106^2 + 265670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15232797001 + ... + 15232797016.

Almost surely, 2^243724752136 is an apocalyptic number.

It is an amenable number.

243724752136 is a deficient number, since it is larger than the sum of its proper divisors (213259158134).

243724752136 is a wasteful number, since it uses less digits than its factorization.

243724752136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30465594023 (or 30465594019 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 46.

The spelling of 243724752136 in words is "two hundred forty-three billion, seven hundred twenty-four million, seven hundred fifty-two thousand, one hundred thirty-six".