25681709131 has 8 divisors (see below), whose sum is σ = 27678469280. Its totient is φ = 23687983872.

The previous prime is 25681709129. The next prime is 25681709159. The reversal of 25681709131 is 13190718652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25681709131 - 2¹ = 25681709129 is a prime.

It is a super-2 number, since 2×25681709131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25681709171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741126 + ... + 775003.

It is an arithmetic number, because the mean of its divisors is an integer number (3459808660).

Almost surely, 2^25681709131 is an apocalyptic number.

25681709131 is a deficient number, since it is larger than the sum of its proper divisors (1996760149).

25681709131 is a wasteful number, since it uses less digits than its factorization.

25681709131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517445.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 25681709131 in words is "twenty-five billion, six hundred eighty-one million, seven hundred nine thousand, one hundred thirty-one".