24779143878109 has 2 divisors, whose sum is σ = 24779143878110. Its totient is φ = 24779143878108.

The previous prime is 24779143878107. The next prime is 24779143878161. The reversal of 24779143878109 is 90187834197742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23571898908100 + 1207244970009 = 4855090^2 + 1098747^2 .

It is a cyclic number.

It is not a de Polignac number, because 24779143878109 - 2¹ = 24779143878107 is a prime.

It is a super-2 number, since 2×24779143878109² (a number of 28 digits) contains 22 as substring.

Together with 24779143878107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24779143878107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12389571939054 + 12389571939055.

It is an arithmetic number, because the mean of its divisors is an integer number (12389571939055).

Almost surely, 2^{24779143878109} is an apocalyptic number.

It is an amenable number.

24779143878109 is a deficient number, since it is larger than the sum of its proper divisors (1).

24779143878109 is an equidigital number, since it uses as much as digits as its factorization.

24779143878109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170698752, while the sum is 70.

The spelling of 24779143878109 in words is "twenty-four trillion, seven hundred seventy-nine billion, one hundred forty-three million, eight hundred seventy-eight thousand, one hundred nine".