25649673 has 16 divisors (see below), whose sum is σ = 39638016. Its totient is φ = 14449680.

The previous prime is 25649653. The next prime is 25649681. The reversal of 25649673 is 37694652.

It is not a de Polignac number, because 25649673 - 2⁶ = 25649609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25649633) 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, 7111 + ... + 10092.

It is an arithmetic number, because the mean of its divisors is an integer number (2477376).

Almost surely, 2^25649673 is an apocalyptic number.

It is an amenable number.

25649673 is a deficient number, since it is larger than the sum of its proper divisors (13988343).

25649673 is a wasteful number, since it uses less digits than its factorization.

25649673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17284.

The product of its digits is 272160, while the sum is 42.

The square root of 25649673 is about 5064.5506217235. The cubic root of 25649673 is about 294.9130185002.

The spelling of 25649673 in words is "twenty-five million, six hundred forty-nine thousand, six hundred seventy-three".