25780953 has 16 divisors (see below), whose sum is σ = 39131136. Its totient is φ = 14945040.

The previous prime is 25780943. The next prime is 25780961. The reversal of 25780953 is 35908752.

It is not a de Polignac number, because 25780953 - 2⁵ = 25780921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25780943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16225 + ... + 17742.

It is an arithmetic number, because the mean of its divisors is an integer number (2445696).

Almost surely, 2^25780953 is an apocalyptic number.

25780953 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25780953 is a deficient number, since it is larger than the sum of its proper divisors (13350183).

25780953 is a wasteful number, since it uses less digits than its factorization.

25780953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34004.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 25780953 is about 5077.4947562750. The cubic root of 25780953 is about 295.4153032134.

The spelling of 25780953 in words is "twenty-five million, seven hundred eighty thousand, nine hundred fifty-three".