243244142341655 has 64 divisors (see below), whose sum is σ = 366907191533568. Its totient is φ = 150685296675840.

The previous prime is 243244142341619. The next prime is 243244142341691. The reversal of 243244142341655 is 556143241442342.

It is an interprime number because it is at equal distance from previous prime (243244142341619) and next prime (243244142341691).

It is a de Polignac number, because none of the positive numbers 2^k-243244142341655 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 837954419 + ... + 838244651.

It is an arithmetic number, because the mean of its divisors is an integer number (5732924867712).

Almost surely, 2^{243244142341655} is an apocalyptic number.

243244142341655 is a deficient number, since it is larger than the sum of its proper divisors (123663049191913).

243244142341655 is a wasteful number, since it uses less digits than its factorization.

243244142341655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329496.

The product of its digits is 11059200, while the sum is 50.

Adding to 243244142341655 its reverse (556143241442342), we get a palindrome (799387383783997).

The spelling of 243244142341655 in words is "two hundred forty-three trillion, two hundred forty-four billion, one hundred forty-two million, three hundred forty-one thousand, six hundred fifty-five".