243861922945 has 8 divisors (see below), whose sum is σ = 292703529960. Its totient is φ = 195043390080.

The previous prime is 243861922937. The next prime is 243861922963. The reversal of 243861922945 is 549229168342.

It can be written as a sum of positive squares in 4 ways, for example, as 188653841649 + 55208081296 = 434343^2 + 234964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243861922945 - 2³ = 243861922937 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5745276 + ... + 5787565.

It is an arithmetic number, because the mean of its divisors is an integer number (36587941245).

Almost surely, 2^243861922945 is an apocalyptic number.

It is an amenable number.

243861922945 is a deficient number, since it is larger than the sum of its proper divisors (48841607015).

243861922945 is a wasteful number, since it uses less digits than its factorization.

243861922945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11537075.

The product of its digits is 7464960, while the sum is 55.

The spelling of 243861922945 in words is "two hundred forty-three billion, eight hundred sixty-one million, nine hundred twenty-two thousand, nine hundred forty-five".