25717527969 has 16 divisors (see below), whose sum is σ = 39322372992. Its totient is φ = 14645570688.

The previous prime is 25717527949. The next prime is 25717527977. The reversal of 25717527969 is 96972571752.

It is a happy number.

It is not a de Polignac number, because 25717527969 - 2²⁴ = 25700750753 is a prime.

It is a super-2 number, since 2×25717527969² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25717527949) 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 15 ways as a sum of consecutive naturals, for example, 2083684 + ... + 2095989.

It is an arithmetic number, because the mean of its divisors is an integer number (2457648312).

Almost surely, 2^25717527969 is an apocalyptic number.

It is an amenable number.

25717527969 is a deficient number, since it is larger than the sum of its proper divisors (13604845023).

25717527969 is a wasteful number, since it uses less digits than its factorization.

25717527969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179976.

The product of its digits is 16669800, while the sum is 60.

The spelling of 25717527969 in words is "twenty-five billion, seven hundred seventeen million, five hundred twenty-seven thousand, nine hundred sixty-nine".