24779548217 has 2 divisors, whose sum is σ = 24779548218. Its totient is φ = 24779548216.

The previous prime is 24779548139. The next prime is 24779548223. The reversal of 24779548217 is 71284597742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17766490681 + 7013057536 = 133291^2 + 83744^2 .

It is a cyclic number.

It is not a de Polignac number, because 24779548217 - 2³⁰ = 23705806393 is a prime.

It is a super-2 number, since 2×24779548217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (24772548217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12389774108 + 12389774109.

It is an arithmetic number, because the mean of its divisors is an integer number (12389774109).

Almost surely, 2^24779548217 is an apocalyptic number.

It is an amenable number.

24779548217 is a deficient number, since it is larger than the sum of its proper divisors (1).

24779548217 is an equidigital number, since it uses as much as digits as its factorization.

24779548217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7902720, while the sum is 56.

The spelling of 24779548217 in words is "twenty-four billion, seven hundred seventy-nine million, five hundred forty-eight thousand, two hundred seventeen".