25502504761 has 2 divisors, whose sum is σ = 25502504762. Its totient is φ = 25502504760.

The previous prime is 25502504749. The next prime is 25502504821. The reversal of 25502504761 is 16740520552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24205136400 + 1297368361 = 155580^2 + 36019^2 .

It is a cyclic number.

It is not a de Polignac number, because 25502504761 - 2⁷ = 25502504633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25502504761.

It is not a weakly prime, because it can be changed into another prime (25502504711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751252380 + 12751252381.

It is an arithmetic number, because the mean of its divisors is an integer number (12751252381).

Almost surely, 2^25502504761 is an apocalyptic number.

It is an amenable number.

25502504761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25502504761 is an equidigital number, since it uses as much as digits as its factorization.

25502504761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 25502504761 in words is "twenty-five billion, five hundred two million, five hundred four thousand, seven hundred sixty-one".