26987092189 has 4 divisors (see below), whose sum is σ = 27018509920. Its totient is φ = 26955674460.

The previous prime is 26987092169. The next prime is 26987092219. The reversal of 26987092189 is 98129078962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26987092189 - 2⁵ = 26987092157 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 (26987092169) 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 3 ways as a sum of consecutive naturals, for example, 15707577 + ... + 15709294.

It is an arithmetic number, because the mean of its divisors is an integer number (6754627480).

Almost surely, 2^26987092189 is an apocalyptic number.

It is an amenable number.

26987092189 is a deficient number, since it is larger than the sum of its proper divisors (31417731).

26987092189 is an equidigital number, since it uses as much as digits as its factorization.

26987092189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31417730.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 26987092189 in words is "twenty-six billion, nine hundred eighty-seven million, ninety-two thousand, one hundred eighty-nine".