25550849 has 2 divisors, whose sum is σ = 25550850. Its totient is φ = 25550848.

The previous prime is 25550843. The next prime is 25550857. The reversal of 25550849 is 94805552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21224449 + 4326400 = 4607^2 + 2080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25550849 is a prime.

It is not a weakly prime, because it can be changed into another prime (25550843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775424 + 12775425.

It is an arithmetic number, because the mean of its divisors is an integer number (12775425).

It is a Proth number, since it is equal to 3119 ⋅ 2¹³ + 1 and 3119 < 2¹³.

Almost surely, 2^25550849 is an apocalyptic number.

It is an amenable number.

25550849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550849 is an equidigital number, since it uses as much as digits as its factorization.

25550849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 25550849 is about 5054.7847629746. The cubic root of 25550849 is about 294.5337804737.

The spelling of 25550849 in words is "twenty-five million, five hundred fifty thousand, eight hundred forty-nine".