26825057257 has 8 divisors (see below), whose sum is σ = 27276948360. Its totient is φ = 26373557760.

The previous prime is 26825057227. The next prime is 26825057267. The reversal of 26825057257 is 75275052862.

It can be written as a sum of positive squares in 4 ways, for example, as 8391292816 + 18433764441 = 91604^2 + 135771^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26825057257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26825057257.

It is not an unprimeable number, because it can be changed into a prime (26825057227) 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, 41919 + ... + 235387.

It is an arithmetic number, because the mean of its divisors is an integer number (3409618545).

Almost surely, 2^26825057257 is an apocalyptic number.

It is an amenable number.

26825057257 is a deficient number, since it is larger than the sum of its proper divisors (451891103).

26825057257 is a wasteful number, since it uses less digits than its factorization.

26825057257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195803.

The product of its (nonzero) digits is 2352000, while the sum is 49.

The spelling of 26825057257 in words is "twenty-six billion, eight hundred twenty-five million, fifty-seven thousand, two hundred fifty-seven".