243776115007 has 16 divisors (see below), whose sum is σ = 258464194272. Its totient is φ = 229126993920.

The previous prime is 243776114993. The next prime is 243776115049. The reversal of 243776115007 is 700511677342.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243776115007 is a prime.

It is a super-2 number, since 2×243776115007² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243776115307) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 55948273 + ... + 55952629.

It is an arithmetic number, because the mean of its divisors is an integer number (16154012142).

Almost surely, 2^243776115007 is an apocalyptic number.

243776115007 is a deficient number, since it is larger than the sum of its proper divisors (14688079265).

243776115007 is a wasteful number, since it uses less digits than its factorization.

243776115007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058.

The product of its (nonzero) digits is 246960, while the sum is 43.

The spelling of 243776115007 in words is "two hundred forty-three billion, seven hundred seventy-six million, one hundred fifteen thousand, seven".