25780163 has 6 divisors (see below), whose sum is σ = 25970796. Its totient is φ = 25590432.

The previous prime is 25780151. The next prime is 25780187. The reversal of 25780163 is 36108752.

It is a happy number.

It is not a de Polignac number, because 25780163 - 2⁸ = 25779907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25780063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76331 + ... + 76667.

It is an arithmetic number, because the mean of its divisors is an integer number (4328466).

Almost surely, 2^25780163 is an apocalyptic number.

25780163 is a deficient number, since it is larger than the sum of its proper divisors (190633).

25780163 is an frugal number, since it uses more digits than its factorization.

25780163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 25780163 is about 5077.4169614086. The cubic root of 25780163 is about 295.4122857341.

The spelling of 25780163 in words is "twenty-five million, seven hundred eighty thousand, one hundred sixty-three".