243775237696 has 21 divisors (see below), whose sum is σ = 483749325489. Its totient is φ = 121885643904.

The previous prime is 243775237619. The next prime is 243775237697. The reversal of 243775237696 is 696732577342.

It is a happy number.

The square root of 243775237696 is 493736.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 23311182400 + 220464055296 = 152680^2 + 469536^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243775237697) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3919030 + ... + 3980746.

Almost surely, 2^243775237696 is an apocalyptic number.

243775237696 is the 493736-th square number.

It is an amenable number.

243775237696 is a deficient number, since it is larger than the sum of its proper divisors (239974087793).

243775237696 is an frugal number, since it uses more digits than its factorization.

243775237696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123446 (or 61719 counting only the distinct ones).

The product of its digits is 80015040, while the sum is 61.

The spelling of 243775237696 in words is "two hundred forty-three billion, seven hundred seventy-five million, two hundred thirty-seven thousand, six hundred ninety-six".