24369872561 has 2 divisors, whose sum is σ = 24369872562. Its totient is φ = 24369872560.

The previous prime is 24369872539. The next prime is 24369872573. The reversal of 24369872561 is 16527896342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19612321936 + 4757550625 = 140044^2 + 68975^2 .

It is a cyclic number.

It is not a de Polignac number, because 24369872561 - 2²⁶ = 24302763697 is a prime.

It is not a weakly prime, because it can be changed into another prime (24369872581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12184936280 + 12184936281.

It is an arithmetic number, because the mean of its divisors is an integer number (12184936281).

Almost surely, 2^24369872561 is an apocalyptic number.

It is an amenable number.

24369872561 is a deficient number, since it is larger than the sum of its proper divisors (1).

24369872561 is an equidigital number, since it uses as much as digits as its factorization.

24369872561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The spelling of 24369872561 in words is "twenty-four billion, three hundred sixty-nine million, eight hundred seventy-two thousand, five hundred sixty-one".