25653559 has 2 divisors, whose sum is σ = 25653560. Its totient is φ = 25653558.

The previous prime is 25653547. The next prime is 25653581. The reversal of 25653559 is 95535652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25653559 - 2¹⁷ = 25522487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25653359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826779 + 12826780.

It is an arithmetic number, because the mean of its divisors is an integer number (12826780).

Almost surely, 2^25653559 is an apocalyptic number.

25653559 is a deficient number, since it is larger than the sum of its proper divisors (1).

25653559 is an equidigital number, since it uses as much as digits as its factorization.

25653559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 40.

The square root of 25653559 is about 5064.9342542623. The cubic root of 25653559 is about 294.9279111413.

The spelling of 25653559 in words is "twenty-five million, six hundred fifty-three thousand, five hundred fifty-nine".