26908247809 has 16 divisors (see below), whose sum is σ = 27327559680. Its totient is φ = 26493022080.

The previous prime is 26908247803. The next prime is 26908247827. The reversal of 26908247809 is 90874280962.

It is a cyclic number.

It is not a de Polignac number, because 26908247809 - 2¹⁵ = 26908215041 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 26908247809.

It is not an unprimeable number, because it can be changed into a prime (26908247803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9598402 + ... + 9601204.

It is an arithmetic number, because the mean of its divisors is an integer number (1707972480).

Almost surely, 2^26908247809 is an apocalyptic number.

It is an amenable number.

26908247809 is a deficient number, since it is larger than the sum of its proper divisors (419311871).

26908247809 is a wasteful number, since it uses less digits than its factorization.

26908247809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 26908247809 in words is "twenty-six billion, nine hundred eight million, two hundred forty-seven thousand, eight hundred nine".