26906457769 has 4 divisors (see below), whose sum is σ = 26910764244. Its totient is φ = 26902151296.

The previous prime is 26906457761. The next prime is 26906457779. The reversal of 26906457769 is 96775460962.

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 23589273744 + 3317184025 = 153588^2 + 57595^2 .

It is a cyclic number.

It is not a de Polignac number, because 26906457769 - 2³ = 26906457761 is a prime.

It is a super-2 number, since 2×26906457769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26906457761) 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, 2143852 + ... + 2156365.

It is an arithmetic number, because the mean of its divisors is an integer number (6727691061).

Almost surely, 2^26906457769 is an apocalyptic number.

It is an amenable number.

26906457769 is a deficient number, since it is larger than the sum of its proper divisors (4306475).

26906457769 is an equidigital number, since it uses as much as digits as its factorization.

26906457769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306474.

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 26906457769 in words is "twenty-six billion, nine hundred six million, four hundred fifty-seven thousand, seven hundred sixty-nine".