25996646 has 16 divisors (see below), whose sum is σ = 42330624. Its totient is φ = 11902464.

The previous prime is 25996643. The next prime is 25996657. The reversal of 25996646 is 64669952.

It is a self number, because there is not a number n which added to its sum of digits gives 25996646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25996643) 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 7 ways as a sum of consecutive naturals, for example, 635 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (2645664).

Almost surely, 2^25996646 is an apocalyptic number.

25996646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25996646 is a deficient number, since it is larger than the sum of its proper divisors (16333978).

25996646 is a wasteful number, since it uses less digits than its factorization.

25996646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015.

The product of its digits is 699840, while the sum is 47.

The square root of 25996646 is about 5098.6906162269. The cubic root of 25996646 is about 296.2368675598.

The spelling of 25996646 in words is "twenty-five million, nine hundred ninety-six thousand, six hundred forty-six".