25317871487 has 8 divisors (see below), whose sum is σ = 25925588304. Its totient is φ = 24711015168.

The previous prime is 25317871457. The next prime is 25317871511. The reversal of 25317871487 is 78417871352.

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 25317871487 - 2¹² = 25317867391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25317871417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155378 + ... + 273455.

It is an arithmetic number, because the mean of its divisors is an integer number (3240698538).

Almost surely, 2^25317871487 is an apocalyptic number.

25317871487 is a deficient number, since it is larger than the sum of its proper divisors (607716817).

25317871487 is a wasteful number, since it uses less digits than its factorization.

25317871487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430249.

The product of its digits is 2634240, while the sum is 53.

The spelling of 25317871487 in words is "twenty-five billion, three hundred seventeen million, eight hundred seventy-one thousand, four hundred eighty-seven".