25478924687 has 2 divisors, whose sum is σ = 25478924688. Its totient is φ = 25478924686.

The previous prime is 25478924683. The next prime is 25478924711. The reversal of 25478924687 is 78642987452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25478924687 - 2² = 25478924683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25478924683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739462343 + 12739462344.

It is an arithmetic number, because the mean of its divisors is an integer number (12739462344).

Almost surely, 2^25478924687 is an apocalyptic number.

25478924687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478924687 is an equidigital number, since it uses as much as digits as its factorization.

25478924687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54190080, while the sum is 62.

The spelling of 25478924687 in words is "twenty-five billion, four hundred seventy-eight million, nine hundred twenty-four thousand, six hundred eighty-seven".