25809642712 has 32 divisors (see below), whose sum is σ = 58217241600. Its totient is φ = 10479102624.

The previous prime is 25809642643. The next prime is 25809642739. The reversal of 25809642712 is 21724690852.

It is a super-2 number, since 2×25809642712² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12127528 + ... + 12129655.

It is an arithmetic number, because the mean of its divisors is an integer number (1819288800).

Almost surely, 2^25809642712 is an apocalyptic number.

It is an amenable number.

25809642712 is an abundant number, since it is smaller than the sum of its proper divisors (32407598888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25809642712 is a wasteful number, since it uses less digits than its factorization.

25809642712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257215 (or 24257211 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 25809642712 in words is "twenty-five billion, eight hundred nine million, six hundred forty-two thousand, seven hundred twelve".