243977343779342 has 16 divisors (see below), whose sum is σ = 369600844158864. Its totient is φ = 120777136920000.

The previous prime is 243977343779303. The next prime is 243977343779347.

243977343779342 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 243977343779342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243977343779347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12062384 + ... + 25168547.

It is an arithmetic number, because the mean of its divisors is an integer number (23100052759929).

Almost surely, 2^{243977343779342} is an apocalyptic number.

243977343779342 is a deficient number, since it is larger than the sum of its proper divisors (125623500379522).

243977343779342 is a wasteful number, since it uses less digits than its factorization.

243977343779342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37263475.

The product of its digits is 4032758016, while the sum is 74.

The spelling of 243977343779342 in words is "two hundred forty-three trillion, nine hundred seventy-seven billion, three hundred forty-three million, seven hundred seventy-nine thousand, three hundred forty-two".