26425787261 has 4 divisors (see below), whose sum is σ = 26426692572. Its totient is φ = 26424881952.

The previous prime is 26425787251. The next prime is 26425787291. The reversal of 26425787261 is 16278752462.

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 18234451225 + 8191336036 = 135035^2 + 90506^2 .

It is a cyclic number.

It is not a de Polignac number, because 26425787261 - 2⁶ = 26425787197 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 (26425787221) 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, 407360 + ... + 467753.

It is an arithmetic number, because the mean of its divisors is an integer number (6606673143).

Almost surely, 2^26425787261 is an apocalyptic number.

It is an amenable number.

26425787261 is a deficient number, since it is larger than the sum of its proper divisors (905311).

26425787261 is an equidigital number, since it uses as much as digits as its factorization.

26425787261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905310.

The product of its digits is 2257920, while the sum is 50.

The spelling of 26425787261 in words is "twenty-six billion, four hundred twenty-five million, seven hundred eighty-seven thousand, two hundred sixty-one".