26250605261 has 8 divisors (see below), whose sum is σ = 26302604664. Its totient is φ = 26198645760.

The previous prime is 26250605231. The next prime is 26250605273. The reversal of 26250605261 is 16250605262.

It can be written as a sum of positive squares in 4 ways, for example, as 8692765225 + 17557840036 = 93235^2 + 132506^2 .

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 26250605261 - 2⁶ = 26250605197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26250605221) by changing a digit.

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, 1537391 + ... + 1554371.

It is an arithmetic number, because the mean of its divisors is an integer number (3287825583).

Almost surely, 2^26250605261 is an apocalyptic number.

It is an amenable number.

26250605261 is a deficient number, since it is larger than the sum of its proper divisors (51999403).

26250605261 is a wasteful number, since it uses less digits than its factorization.

26250605261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19951.

The product of its (nonzero) digits is 43200, while the sum is 35.

Subtracting from 26250605261 its reverse (16250605262), we obtain a palindrome (9999999999).

The spelling of 26250605261 in words is "twenty-six billion, two hundred fifty million, six hundred five thousand, two hundred sixty-one".