25928492849 has 16 divisors (see below), whose sum is σ = 30505860096. Its totient is φ = 21572308800.

The previous prime is 25928492827. The next prime is 25928492873. The reversal of 25928492849 is 94829482952.

It is a happy number.

It is not a de Polignac number, because 25928492849 - 2²⁰ = 25927444273 is a prime.

It is a Duffinian number.

25928492849 is a modest number, since divided by 28492849 gives 259 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 25928492791 and 25928492800.

It is not an unprimeable number, because it can be changed into a prime (25928492449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9857 + ... + 227934.

It is an arithmetic number, because the mean of its divisors is an integer number (1906616256).

Almost surely, 2^25928492849 is an apocalyptic number.

It is an amenable number.

25928492849 is a deficient number, since it is larger than the sum of its proper divisors (4577367247).

25928492849 is a wasteful number, since it uses less digits than its factorization.

25928492849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238256.

The product of its digits is 29859840, while the sum is 62.

The spelling of 25928492849 in words is "twenty-five billion, nine hundred twenty-eight million, four hundred ninety-two thousand, eight hundred forty-nine".