25145663 has 2 divisors, whose sum is σ = 25145664. Its totient is φ = 25145662.

The previous prime is 25145657. The next prime is 25145677. The reversal of 25145663 is 36654152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25145663 - 2⁶ = 25145599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25145633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12572831 + 12572832.

It is an arithmetic number, because the mean of its divisors is an integer number (12572832).

Almost surely, 2^25145663 is an apocalyptic number.

25145663 is a deficient number, since it is larger than the sum of its proper divisors (1).

25145663 is an equidigital number, since it uses as much as digits as its factorization.

25145663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 25145663 is about 5014.5451438790. The cubic root of 25145663 is about 292.9685693550.

The spelling of 25145663 in words is "twenty-five million, one hundred forty-five thousand, six hundred sixty-three".