25741511909 has 2 divisors, whose sum is σ = 25741511910. Its totient is φ = 25741511908.

The previous prime is 25741511899. The next prime is 25741511951. The reversal of 25741511909 is 90911514752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21841884100 + 3899627809 = 147790^2 + 62447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25741511909 is a prime.

It is a super-2 number, since 2×25741511909² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25741511909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25741511209) 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, 12870755954 + 12870755955.

It is an arithmetic number, because the mean of its divisors is an integer number (12870755955).

Almost surely, 2^25741511909 is an apocalyptic number.

It is an amenable number.

25741511909 is a deficient number, since it is larger than the sum of its proper divisors (1).

25741511909 is an equidigital number, since it uses as much as digits as its factorization.

25741511909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 44.

The spelling of 25741511909 in words is "twenty-five billion, seven hundred forty-one million, five hundred eleven thousand, nine hundred nine".