24787328861 has 2 divisors, whose sum is σ = 24787328862. Its totient is φ = 24787328860.

The previous prime is 24787328837. The next prime is 24787328879. The reversal of 24787328861 is 16882378742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852937636 + 5934391225 = 137306^2 + 77035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24787328861 is a prime.

It is a super-2 number, since 2×24787328861² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 24787328797 and 24787328806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24787328821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12393664430 + 12393664431.

It is an arithmetic number, because the mean of its divisors is an integer number (12393664431).

Almost surely, 2^24787328861 is an apocalyptic number.

It is an amenable number.

24787328861 is a deficient number, since it is larger than the sum of its proper divisors (1).

24787328861 is an equidigital number, since it uses as much as digits as its factorization.

24787328861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 56.

The spelling of 24787328861 in words is "twenty-four billion, seven hundred eighty-seven million, three hundred twenty-eight thousand, eight hundred sixty-one".