25195319895 has 16 divisors (see below), whose sum is σ = 40327022592. Its totient is φ = 13432667040.

The previous prime is 25195319861. The next prime is 25195319909. The reversal of 25195319895 is 59891359152.

It is a happy number.

It is not a de Polignac number, because 25195319895 - 2¹⁸ = 25195057751 is a prime.

It is a super-2 number, since 2×25195319895² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259047 + ... + 342776.

It is an arithmetic number, because the mean of its divisors is an integer number (2520438912).

Almost surely, 2^25195319895 is an apocalyptic number.

25195319895 is a deficient number, since it is larger than the sum of its proper divisors (15131702697).

25195319895 is a wasteful number, since it uses less digits than its factorization.

25195319895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604622.

The product of its digits is 4374000, while the sum is 57.

The spelling of 25195319895 in words is "twenty-five billion, one hundred ninety-five million, three hundred nineteen thousand, eight hundred ninety-five".