24513122561 has 2 divisors, whose sum is σ = 24513122562. Its totient is φ = 24513122560.

The previous prime is 24513122539. The next prime is 24513122587. The reversal of 24513122561 is 16522131542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20379275536 + 4133847025 = 142756^2 + 64295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24513122561 is a prime.

It is a super-3 number, since 3×24513122561³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (24513121561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12256561280 + 12256561281.

It is an arithmetic number, because the mean of its divisors is an integer number (12256561281).

Almost surely, 2^24513122561 is an apocalyptic number.

It is an amenable number.

24513122561 is a deficient number, since it is larger than the sum of its proper divisors (1).

24513122561 is an equidigital number, since it uses as much as digits as its factorization.

24513122561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The spelling of 24513122561 in words is "twenty-four billion, five hundred thirteen million, one hundred twenty-two thousand, five hundred sixty-one".