25685347759 has 4 divisors (see below), whose sum is σ = 26169977016. Its totient is φ = 25200718504.

The previous prime is 25685347741. The next prime is 25685347769. The reversal of 25685347759 is 95774358652.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25685347759 - 2¹³ = 25685339567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25685347697 and 25685347706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25685347739) 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, 242314549 + ... + 242314654.

It is an arithmetic number, because the mean of its divisors is an integer number (6542494254).

Almost surely, 2^25685347759 is an apocalyptic number.

25685347759 is a deficient number, since it is larger than the sum of its proper divisors (484629257).

25685347759 is an equidigital number, since it uses as much as digits as its factorization.

25685347759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484629256.

The product of its digits is 63504000, while the sum is 61.

The spelling of 25685347759 in words is "twenty-five billion, six hundred eighty-five million, three hundred forty-seven thousand, seven hundred fifty-nine".