26861536861 has 8 divisors (see below), whose sum is σ = 28184292864. Its totient is φ = 25551686160.

The previous prime is 26861536853. The next prime is 26861536909. The reversal of 26861536861 is 16863516862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26861536861 - 2³ = 26861536853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26861536799 and 26861536808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26861536831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3222061 + ... + 3230386.

It is an arithmetic number, because the mean of its divisors is an integer number (3523036608).

Almost surely, 2^26861536861 is an apocalyptic number.

It is an amenable number.

26861536861 is a deficient number, since it is larger than the sum of its proper divisors (1322756003).

26861536861 is a wasteful number, since it uses less digits than its factorization.

26861536861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452651.

The product of its digits is 2488320, while the sum is 52.

The spelling of 26861536861 in words is "twenty-six billion, eight hundred sixty-one million, five hundred thirty-six thousand, eight hundred sixty-one".