26871939869 has 4 divisors (see below), whose sum is σ = 26896571520. Its totient is φ = 26847308220.

The previous prime is 26871939841. The next prime is 26871939877. The reversal of 26871939869 is 96893917862.

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 26871939869 - 2¹⁶ = 26871874333 is a prime.

It is a super-2 number, since 2×26871939869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26871939799 and 26871939808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26871939169) 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, 12314189 + ... + 12316370.

It is an arithmetic number, because the mean of its divisors is an integer number (6724142880).

Almost surely, 2^26871939869 is an apocalyptic number.

It is an amenable number.

26871939869 is a deficient number, since it is larger than the sum of its proper divisors (24631651).

26871939869 is a wasteful number, since it uses less digits than its factorization.

26871939869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24631650.

The product of its digits is 70543872, while the sum is 68.

The spelling of 26871939869 in words is "twenty-six billion, eight hundred seventy-one million, nine hundred thirty-nine thousand, eight hundred sixty-nine".