25716744139 has 4 divisors (see below), whose sum is σ = 25721445024. Its totient is φ = 25712043256.

The previous prime is 25716744083. The next prime is 25716744173. The reversal of 25716744139 is 93144761752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25716744139 is a prime.

It is a super-2 number, since 2×25716744139² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25716744092 and 25716744101.

It is not an unprimeable number, because it can be changed into a prime (25716744539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342227 + ... + 2353180.

It is an arithmetic number, because the mean of its divisors is an integer number (6430361256).

Almost surely, 2^25716744139 is an apocalyptic number.

25716744139 is a deficient number, since it is larger than the sum of its proper divisors (4700885).

25716744139 is an equidigital number, since it uses as much as digits as its factorization.

25716744139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700884.

The product of its digits is 1270080, while the sum is 49.

The spelling of 25716744139 in words is "twenty-five billion, seven hundred sixteen million, seven hundred forty-four thousand, one hundred thirty-nine".