25555645 has 16 divisors (see below), whose sum is σ = 32533632. Its totient is φ = 19229760.

The previous prime is 25555643. The next prime is 25555661. The reversal of 25555645 is 54655552.

It is not a de Polignac number, because 25555645 - 2¹ = 25555643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5194 + ... + 8836.

It is an arithmetic number, because the mean of its divisors is an integer number (2033352).

Almost surely, 2^25555645 is an apocalyptic number.

It is an amenable number.

25555645 is a deficient number, since it is larger than the sum of its proper divisors (6977987).

25555645 is a wasteful number, since it uses less digits than its factorization.

25555645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732.

The product of its digits is 150000, while the sum is 37.

The square root of 25555645 is about 5055.2591427146. The cubic root of 25555645 is about 294.5522077236.

The spelling of 25555645 in words is "twenty-five million, five hundred fifty-five thousand, six hundred forty-five".