25780113 has 24 divisors (see below), whose sum is σ = 38857728. Its totient is φ = 17079984.

The previous prime is 25780087. The next prime is 25780121. The reversal of 25780113 is 31108752.

It is not a de Polignac number, because 25780113 - 2¹² = 25776017 is a prime.

It is a super-2 number, since 2×25780113² = 1329228452585538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25784113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67120 + ... + 67502.

It is an arithmetic number, because the mean of its divisors is an integer number (1619072).

Almost surely, 2^25780113 is an apocalyptic number.

It is an amenable number.

25780113 is a deficient number, since it is larger than the sum of its proper divisors (13077615).

25780113 is an equidigital number, since it uses as much as digits as its factorization.

25780113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 25780113 is about 5077.4120376428. The cubic root of 25780113 is about 295.4120947524.

Adding to 25780113 its reverse (31108752), we get a palindrome (56888865).

The spelling of 25780113 in words is "twenty-five million, seven hundred eighty thousand, one hundred thirteen".