27726389861 has 8 divisors (see below), whose sum is σ = 28901426400. Its totient is φ = 26565950320.

The previous prime is 27726389857. The next prime is 27726389891. The reversal of 27726389861 is 16898362772.

It is a happy number.

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 27726389861 - 2² = 27726389857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27726389861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27726389891) 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, 3645371 + ... + 3652968.

It is an arithmetic number, because the mean of its divisors is an integer number (3612678300).

Almost surely, 2^27726389861 is an apocalyptic number.

It is an amenable number.

27726389861 is a deficient number, since it is larger than the sum of its proper divisors (1175036539).

27726389861 is a wasteful number, since it uses less digits than its factorization.

27726389861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7298499.

The product of its digits is 12192768, while the sum is 59.

The spelling of 27726389861 in words is "twenty-seven billion, seven hundred twenty-six million, three hundred eighty-nine thousand, eight hundred sixty-one".