25195319952 has 160 divisors (see below), whose sum is σ = 72550118400. Its totient is φ = 7470144000.

The previous prime is 25195319923. The next prime is 25195319953. The reversal of 25195319952 is 25991359152.

It is a junction number, because it is equal to n+sod(n) for n = 25195319895 and 25195319904.

It is not an unprimeable number, because it can be changed into a prime (25195319953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6407427 + ... + 6411357.

It is an arithmetic number, because the mean of its divisors is an integer number (453438240).

Almost surely, 2^25195319952 is an apocalyptic number.

25195319952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25195319952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36275059200).

25195319952 is an abundant number, since it is smaller than the sum of its proper divisors (47354798448).

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

25195319952 is a wasteful number, since it uses less digits than its factorization.

25195319952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213 (or 4207 counting only the distinct ones).

The product of its digits is 1093500, while the sum is 51.

The spelling of 25195319952 in words is "twenty-five billion, one hundred ninety-five million, three hundred nineteen thousand, nine hundred fifty-two".