243681125264511 has 8 divisors (see below), whose sum is σ = 354445273112064. Its totient is φ = 147685530463320.

The previous prime is 243681125264471. The next prime is 243681125264587. The reversal of 243681125264511 is 115462521186342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243681125264511 - 2³¹ = 243678977780863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243681125264711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692138261551 + ... + 3692138261616.

It is an arithmetic number, because the mean of its divisors is an integer number (44305659139008).

Almost surely, 2^{243681125264511} is an apocalyptic number.

243681125264511 is a deficient number, since it is larger than the sum of its proper divisors (110764147847553).

243681125264511 is a wasteful number, since it uses less digits than its factorization.

243681125264511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7384276523181.

The product of its digits is 2764800, while the sum is 51.

The spelling of 243681125264511 in words is "two hundred forty-three trillion, six hundred eighty-one billion, one hundred twenty-five million, two hundred sixty-four thousand, five hundred eleven".