243396261154 has 4 divisors (see below), whose sum is σ = 365094391734. Its totient is φ = 121698130576.

The previous prime is 243396261137. The next prime is 243396261161. The reversal of 243396261154 is 451162693342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 167866381225 + 75529879929 = 409715^2 + 274827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60849065287 + ... + 60849065290.

Almost surely, 2^243396261154 is an apocalyptic number.

243396261154 is a deficient number, since it is larger than the sum of its proper divisors (121698130580).

243396261154 is a wasteful number, since it uses less digits than its factorization.

243396261154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121698130579.

The product of its digits is 933120, while the sum is 46.

The spelling of 243396261154 in words is "two hundred forty-three billion, three hundred ninety-six million, two hundred sixty-one thousand, one hundred fifty-four".