25645565753 has 2 divisors, whose sum is σ = 25645565754. Its totient is φ = 25645565752.

The previous prime is 25645565749. The next prime is 25645565767. The reversal of 25645565753 is 35756554652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25024708864 + 620856889 = 158192^2 + 24917^2 .

It is a cyclic number.

It is not a de Polignac number, because 25645565753 - 2² = 25645565749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25645565695 and 25645565704.

It is not a weakly prime, because it can be changed into another prime (25645595753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12822782876 + 12822782877.

It is an arithmetic number, because the mean of its divisors is an integer number (12822782877).

Almost surely, 2^25645565753 is an apocalyptic number.

It is an amenable number.

25645565753 is a deficient number, since it is larger than the sum of its proper divisors (1).

25645565753 is an equidigital number, since it uses as much as digits as its factorization.

25645565753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900000, while the sum is 53.

The spelling of 25645565753 in words is "twenty-five billion, six hundred forty-five million, five hundred sixty-five thousand, seven hundred fifty-three".