25653855439 has 2 divisors, whose sum is σ = 25653855440. Its totient is φ = 25653855438.

The previous prime is 25653855361. The next prime is 25653855473. The reversal of 25653855439 is 93455835652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25653855439 is a prime.

It is a super-3 number, since 3×25653855439³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25653855439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25653853439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826927719 + 12826927720.

It is an arithmetic number, because the mean of its divisors is an integer number (12826927720).

Almost surely, 2^25653855439 is an apocalyptic number.

25653855439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25653855439 is an equidigital number, since it uses as much as digits as its factorization.

25653855439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440000, while the sum is 55.

The spelling of 25653855439 in words is "twenty-five billion, six hundred fifty-three million, eight hundred fifty-five thousand, four hundred thirty-nine".