243781876801 has 4 divisors (see below), whose sum is σ = 250370576212. Its totient is φ = 237193177392.

The previous prime is 243781876769. The next prime is 243781876813. The reversal of 243781876801 is 108678187342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108678187342 = 2 ⋅54339093671.

It can be written as a sum of positive squares in 2 ways, for example, as 110117785600 + 133664091201 = 331840^2 + 365601^2 .

It is not a de Polignac number, because 243781876801 - 2⁵ = 243781876769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243781876201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3294349650 + ... + 3294349723.

It is an arithmetic number, because the mean of its divisors is an integer number (62592644053).

Almost surely, 2^243781876801 is an apocalyptic number.

It is an amenable number.

243781876801 is a deficient number, since it is larger than the sum of its proper divisors (6588699411).

243781876801 is an equidigital number, since it uses as much as digits as its factorization.

243781876801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6588699410.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 243781876801 in words is "two hundred forty-three billion, seven hundred eighty-one million, eight hundred seventy-six thousand, eight hundred one".