25717017071 has 6 divisors (see below), whose sum is σ = 26883763200. Its totient is φ = 24598885388.

The previous prime is 25717017013. The next prime is 25717017083. The reversal of 25717017071 is 17071071752.

It is a de Polignac number, because none of the positive numbers 2^k-25717017071 is a prime.

It is a super-2 number, since 2×25717017071² (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 (25717017371) 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 5 ways as a sum of consecutive naturals, for example, 24306671 + ... + 24307728.

It is an arithmetic number, because the mean of its divisors is an integer number (4480627200).

Almost surely, 2^25717017071 is an apocalyptic number.

25717017071 is a deficient number, since it is larger than the sum of its proper divisors (1166746129).

25717017071 is an equidigital number, since it uses as much as digits as its factorization.

25717017071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48614445 (or 48614422 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 38.

The spelling of 25717017071 in words is "twenty-five billion, seven hundred seventeen million, seventeen thousand, seventy-one".