25541702687 has 2 divisors, whose sum is σ = 25541702688. Its totient is φ = 25541702686.

The previous prime is 25541702639. The next prime is 25541702689. The reversal of 25541702687 is 78620714552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25541702687 - 2²⁸ = 25273267231 is a prime.

It is a super-2 number, since 2×25541702687² (a number of 22 digits) contains 22 as substring.

Together with 25541702689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25541702689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770851343 + 12770851344.

It is an arithmetic number, because the mean of its divisors is an integer number (12770851344).

Almost surely, 2^25541702687 is an apocalyptic number.

25541702687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25541702687 is an equidigital number, since it uses as much as digits as its factorization.

25541702687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 25541702687 in words is "twenty-five billion, five hundred forty-one million, seven hundred two thousand, six hundred eighty-seven".