25009636873 has 12 divisors (see below), whose sum is σ = 27592421580. Its totient is φ = 22650229056.

The previous prime is 25009636871. The next prime is 25009636889. The reversal of 25009636873 is 37863690052.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3143508489 + 21866128384 = 56067^2 + 147872^2 .

It is not a de Polignac number, because 25009636873 - 2¹ = 25009636871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25009636871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1387138 + ... + 1405051.

It is an arithmetic number, because the mean of its divisors is an integer number (2299368465).

Almost surely, 2^25009636873 is an apocalyptic number.

It is an amenable number.

25009636873 is a deficient number, since it is larger than the sum of its proper divisors (2582784707).

25009636873 is a wasteful number, since it uses less digits than its factorization.

25009636873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792268 (or 2792255 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 25009636873 in words is "twenty-five billion, nine million, six hundred thirty-six thousand, eight hundred seventy-three".