25555567 has 8 divisors (see below), whose sum is σ = 26440400. Its totient is φ = 24681024.

The previous prime is 25555561. The next prime is 25555597. The reversal of 25555567 is 76555552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25555567 - 2¹¹ = 25553519 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659 + ... + 7627.

It is an arithmetic number, because the mean of its divisors is an integer number (3305050).

Almost surely, 2^25555567 is an apocalyptic number.

25555567 is a deficient number, since it is larger than the sum of its proper divisors (884833).

25555567 is a wasteful number, since it uses less digits than its factorization.

25555567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145.

The product of its digits is 262500, while the sum is 40.

The square root of 25555567 is about 5055.2514279707. The cubic root of 25555567 is about 294.5519080495.

The spelling of 25555567 in words is "twenty-five million, five hundred fifty-five thousand, five hundred sixty-seven".