25171122705 has 32 divisors (see below), whose sum is σ = 40863667968. Its totient is φ = 13228185600.

The previous prime is 25171122671. The next prime is 25171122761. The reversal of 25171122705 is 50722117152.

It is not a de Polignac number, because 25171122705 - 2¹⁹ = 25170598417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2295997 + ... + 2306933.

It is an arithmetic number, because the mean of its divisors is an integer number (1276989624).

Almost surely, 2^25171122705 is an apocalyptic number.

It is an amenable number.

25171122705 is a deficient number, since it is larger than the sum of its proper divisors (15692545263).

25171122705 is a wasteful number, since it uses less digits than its factorization.

25171122705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13177.

The product of its (nonzero) digits is 9800, while the sum is 33.

Adding to 25171122705 its reverse (50722117152), we get a palindrome (75893239857).

The spelling of 25171122705 in words is "twenty-five billion, one hundred seventy-one million, one hundred twenty-two thousand, seven hundred five".