25663801 has 4 divisors (see below), whose sum is σ = 25776100. Its totient is φ = 25551504.

The previous prime is 25663793. The next prime is 25663823. The reversal of 25663801 is 10836652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 7182400 = 4299^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 25663801 - 2³ = 25663793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25663831) 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 3 ways as a sum of consecutive naturals, for example, 55806 + ... + 56263.

It is an arithmetic number, because the mean of its divisors is an integer number (6444025).

Almost surely, 2^25663801 is an apocalyptic number.

It is an amenable number.

25663801 is a deficient number, since it is larger than the sum of its proper divisors (112299).

25663801 is a wasteful number, since it uses less digits than its factorization.

25663801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112298.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 25663801 is about 5065.9452227595. The cubic root of 25663801 is about 294.9671552056.

The spelling of 25663801 in words is "twenty-five million, six hundred sixty-three thousand, eight hundred one".