26787011109 has 4 divisors (see below), whose sum is σ = 35716014816. Its totient is φ = 17858007404.

The previous prime is 26787011099. The next prime is 26787011143. The reversal of 26787011109 is 90111078762.

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 26787011109 - 2⁴ = 26787011093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26787013109) 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, 4464501849 + ... + 4464501854.

It is an arithmetic number, because the mean of its divisors is an integer number (8929003704).

Almost surely, 2^26787011109 is an apocalyptic number.

It is an amenable number.

26787011109 is a deficient number, since it is larger than the sum of its proper divisors (8929003707).

26787011109 is an equidigital number, since it uses as much as digits as its factorization.

26787011109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929003706.

The product of its (nonzero) digits is 42336, while the sum is 42.

The spelling of 26787011109 in words is "twenty-six billion, seven hundred eighty-seven million, eleven thousand, one hundred nine".