24778881541 has 2 divisors, whose sum is σ = 24778881542. Its totient is φ = 24778881540.

The previous prime is 24778881527. The next prime is 24778881563. The reversal of 24778881541 is 14518887742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23612932225 + 1165949316 = 153665^2 + 34146^2 .

It is a cyclic number.

It is not a de Polignac number, because 24778881541 - 2¹¹ = 24778879493 is a prime.

It is a super-2 number, since 2×24778881541² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24778881581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12389440770 + 12389440771.

It is an arithmetic number, because the mean of its divisors is an integer number (12389440771).

Almost surely, 2^24778881541 is an apocalyptic number.

It is an amenable number.

24778881541 is a deficient number, since it is larger than the sum of its proper divisors (1).

24778881541 is an equidigital number, since it uses as much as digits as its factorization.

24778881541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4014080, while the sum is 55.

The spelling of 24778881541 in words is "twenty-four billion, seven hundred seventy-eight million, eight hundred eighty-one thousand, five hundred forty-one".