25865872695 has 64 divisors (see below), whose sum is σ = 49807820160. Its totient is φ = 12660212736.

The previous prime is 25865872693. The next prime is 25865872727. The reversal of 25865872695 is 59627856852.

25865872695 is a `hidden beast` number, since 25 + 8 + 6 + 587 + 26 + 9 + 5 = 666.

It is not a de Polignac number, because 25865872695 - 2¹ = 25865872693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25865872693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 261019 + ... + 346211.

It is an arithmetic number, because the mean of its divisors is an integer number (778247190).

Almost surely, 2^25865872695 is an apocalyptic number.

25865872695 is a deficient number, since it is larger than the sum of its proper divisors (23941947465).

25865872695 is a wasteful number, since it uses less digits than its factorization.

25865872695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85393 (or 85387 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 25865872695 in words is "twenty-five billion, eight hundred sixty-five million, eight hundred seventy-two thousand, six hundred ninety-five".