25840671757 has 4 divisors (see below), whose sum is σ = 25841211100. Its totient is φ = 25840132416.

The previous prime is 25840671751. The next prime is 25840671797. The reversal of 25840671757 is 75717604852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13036844041 + 12803827716 = 114179^2 + 113154^2 .

It is a cyclic number.

It is not a de Polignac number, because 25840671757 - 2³ = 25840671749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840671751) 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, 189948 + ... + 296245.

It is an arithmetic number, because the mean of its divisors is an integer number (6460302775).

Almost surely, 2^25840671757 is an apocalyptic number.

It is an amenable number.

25840671757 is a deficient number, since it is larger than the sum of its proper divisors (539343).

25840671757 is an equidigital number, since it uses as much as digits as its factorization.

25840671757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539342.

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 25840671757 in words is "twenty-five billion, eight hundred forty million, six hundred seventy-one thousand, seven hundred fifty-seven".