25209697008 has 20 divisors (see below), whose sum is σ = 65125050728. Its totient is φ = 8403232320.

The previous prime is 25209697003. The next prime is 25209697043. The reversal of 25209697008 is 80079690252.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 525202021 = 25209697008 / (2 + 5 + 2 + 0 + 9 + 6 + 9 + 7 + 0 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25209697003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262600963 + ... + 262601058.

Almost surely, 2^25209697008 is an apocalyptic number.

It is an amenable number.

25209697008 is an abundant number, since it is smaller than the sum of its proper divisors (39915353720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25209697008 is a wasteful number, since it uses less digits than its factorization.

25209697008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525202032 (or 525202026 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 25209697008 in words is "twenty-five billion, two hundred nine million, six hundred ninety-seven thousand, eight".