25787678751 has 16 divisors (see below), whose sum is σ = 38211563520. Its totient is φ = 17188368120.

The previous prime is 25787678747. The next prime is 25787678773. The reversal of 25787678751 is 15787678752.

25787678751 is a `hidden beast` number, since 2 + 578 + 7 + 6 + 7 + 8 + 7 + 51 = 666.

It is not a de Polignac number, because 25787678751 - 2² = 25787678747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25787878751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47266 + ... + 231968.

It is an arithmetic number, because the mean of its divisors is an integer number (2388222720).

Almost surely, 2^25787678751 is an apocalyptic number.

25787678751 is a deficient number, since it is larger than the sum of its proper divisors (12423884769).

25787678751 is a wasteful number, since it uses less digits than its factorization.

25787678751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189883 (or 189877 counting only the distinct ones).

The product of its digits is 46099200, while the sum is 63.

Subtracting from 25787678751 its reverse (15787678752), we obtain a palindrome (9999999999).

The spelling of 25787678751 in words is "twenty-five billion, seven hundred eighty-seven million, six hundred seventy-eight thousand, seven hundred fifty-one".