25517485271 has 8 divisors (see below), whose sum is σ = 26031849984. Its totient is φ = 25007425240.

The previous prime is 25517485267. The next prime is 25517485303. The reversal of 25517485271 is 17258471552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25517485271 - 2² = 25517485267 is a prime.

It is a super-2 number, since 2×25517485271² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25517485211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064195 + ... + 1087908.

It is an arithmetic number, because the mean of its divisors is an integer number (3253981248).

Almost surely, 2^25517485271 is an apocalyptic number.

25517485271 is a deficient number, since it is larger than the sum of its proper divisors (514364713).

25517485271 is a wasteful number, since it uses less digits than its factorization.

25517485271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152341.

The product of its digits is 784000, while the sum is 47.

The spelling of 25517485271 in words is "twenty-five billion, five hundred seventeen million, four hundred eighty-five thousand, two hundred seventy-one".