25714517919 has 4 divisors (see below), whose sum is σ = 34286023896. Its totient is φ = 17143011944.

The previous prime is 25714517911. The next prime is 25714517921. The reversal of 25714517919 is 91971541752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25714517919 - 2³ = 25714517911 is a prime.

It is a super-2 number, since 2×25714517919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25714517911) 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 3 ways as a sum of consecutive naturals, for example, 4285752984 + ... + 4285752989.

It is an arithmetic number, because the mean of its divisors is an integer number (8571505974).

Almost surely, 2^25714517919 is an apocalyptic number.

25714517919 is a deficient number, since it is larger than the sum of its proper divisors (8571505977).

25714517919 is an equidigital number, since it uses as much as digits as its factorization.

25714517919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8571505976.

The product of its digits is 793800, while the sum is 51.

The spelling of 25714517919 in words is "twenty-five billion, seven hundred fourteen million, five hundred seventeen thousand, nine hundred nineteen".