26860017685 has 4 divisors (see below), whose sum is σ = 32232021228. Its totient is φ = 21488014144.

The previous prime is 26860017607. The next prime is 26860017749. The reversal of 26860017685 is 58671006862.

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 4173030801 + 22686986884 = 64599^2 + 150622^2 .

It is a cyclic number.

It is not a de Polignac number, because 26860017685 - 2¹³ = 26860009493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686001764 + ... + 2686001773.

It is an arithmetic number, because the mean of its divisors is an integer number (8058005307).

Almost surely, 2^26860017685 is an apocalyptic number.

It is an amenable number.

26860017685 is a deficient number, since it is larger than the sum of its proper divisors (5372003543).

26860017685 is an equidigital number, since it uses as much as digits as its factorization.

26860017685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372003542.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 26860017685 in words is "twenty-six billion, eight hundred sixty million, seventeen thousand, six hundred eighty-five".