24779143878161 has 2 divisors, whose sum is σ = 24779143878162. Its totient is φ = 24779143878160.

The previous prime is 24779143878109. The next prime is 24779143878173. The reversal of 24779143878161 is 16187834197742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20972333157136 + 3806810721025 = 4579556^2 + 1951105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24779143878161 is a prime.

It is a super-2 number, since 2×24779143878161² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 24779143878091 and 24779143878100.

It is not a weakly prime, because it can be changed into another prime (24779143878061) by changing a digit.

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 as a sum of consecutive naturals, namely, 12389571939080 + 12389571939081.

It is an arithmetic number, because the mean of its divisors is an integer number (12389571939081).

Almost surely, 2^{24779143878161} is an apocalyptic number.

It is an amenable number.

24779143878161 is a deficient number, since it is larger than the sum of its proper divisors (1).

24779143878161 is an equidigital number, since it uses as much as digits as its factorization.

24779143878161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113799168, while the sum is 68.

The spelling of 24779143878161 in words is "twenty-four trillion, seven hundred seventy-nine billion, one hundred forty-three million, eight hundred seventy-eight thousand, one hundred sixty-one".