25632769 has 4 divisors (see below), whose sum is σ = 25730496. Its totient is φ = 25535044.

The previous prime is 25632751. The next prime is 25632799. The reversal of 25632769 is 96723652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25632769 is a prime.

It is a super-2 number, since 2×25632769² = 1314077693214722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25632799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48469 + ... + 48994.

It is an arithmetic number, because the mean of its divisors is an integer number (6432624).

It is a Proth number, since it is equal to 3129 ⋅ 2¹³ + 1 and 3129 < 2¹³.

Almost surely, 2^25632769 is an apocalyptic number.

It is an amenable number.

25632769 is a deficient number, since it is larger than the sum of its proper divisors (97727).

25632769 is an equidigital number, since it uses as much as digits as its factorization.

25632769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97726.

The product of its digits is 136080, while the sum is 40.

The square root of 25632769 is about 5062.8814917989. The cubic root of 25632769 is about 294.8482183862.

The spelling of 25632769 in words is "twenty-five million, six hundred thirty-two thousand, seven hundred sixty-nine".