243795162981 has 16 divisors (see below), whose sum is σ = 328286782784. Its totient is φ = 160924143744.

The previous prime is 243795162943. The next prime is 243795163097. The reversal of 243795162981 is 189261597342.

It is not a de Polignac number, because 243795162981 - 2⁶ = 243795162917 is a prime.

It is a super-2 number, since 2×243795162981² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243795162581) 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, 781216 + ... + 1047801.

It is an arithmetic number, because the mean of its divisors is an integer number (20517923924).

Almost surely, 2^243795162981 is an apocalyptic number.

It is an amenable number.

243795162981 is a deficient number, since it is larger than the sum of its proper divisors (84491619803).

243795162981 is a wasteful number, since it uses less digits than its factorization.

243795162981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829460.

The product of its digits is 6531840, while the sum is 57.

The spelling of 243795162981 in words is "two hundred forty-three billion, seven hundred ninety-five million, one hundred sixty-two thousand, nine hundred eighty-one".