243983978699907 has 16 divisors (see below), whose sum is σ = 339458741821440. Its totient is φ = 155582716166592.

The previous prime is 243983978699873. The next prime is 243983978699947. The reversal of 243983978699907 is 709996879389342.

It is not a de Polignac number, because 243983978699907 - 2⁶ = 243983978699843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243983978699947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5885682 + ... + 22860647.

It is an arithmetic number, because the mean of its divisors is an integer number (21216171363840).

Almost surely, 2^{243983978699907} is an apocalyptic number.

243983978699907 is a deficient number, since it is larger than the sum of its proper divisors (95474763121533).

243983978699907 is a wasteful number, since it uses less digits than its factorization.

243983978699907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28869362.

The product of its (nonzero) digits is 79996750848, while the sum is 93.

The spelling of 243983978699907 in words is "two hundred forty-three trillion, nine hundred eighty-three billion, nine hundred seventy-eight million, six hundred ninety-nine thousand, nine hundred seven".