24728738261 has 2 divisors, whose sum is σ = 24728738262. Its totient is φ = 24728738260.

The previous prime is 24728738233. The next prime is 24728738273. The reversal of 24728738261 is 16283782742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22468211236 + 2260527025 = 149894^2 + 47545^2 .

It is a cyclic number.

It is not a de Polignac number, because 24728738261 - 2¹⁰ = 24728737237 is a prime.

It is a super-2 number, since 2×24728738261² (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 (24728738201) 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, 12364369130 + 12364369131.

It is an arithmetic number, because the mean of its divisors is an integer number (12364369131).

Almost surely, 2^24728738261 is an apocalyptic number.

It is an amenable number.

24728738261 is a deficient number, since it is larger than the sum of its proper divisors (1).

24728738261 is an equidigital number, since it uses as much as digits as its factorization.

24728738261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 50.

The spelling of 24728738261 in words is "twenty-four billion, seven hundred twenty-eight million, seven hundred thirty-eight thousand, two hundred sixty-one".