27726866145 has 24 divisors (see below), whose sum is σ = 52428984192. Its totient is φ = 13443328800.

The previous prime is 27726866143. The next prime is 27726866173. The reversal of 27726866145 is 54166862772.

It is a happy number.

It is not a de Polignac number, because 27726866145 - 2¹ = 27726866143 is a prime.

It is a super-2 number, since 2×27726866145² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27726866091 and 27726866100.

It is not an unprimeable number, because it can be changed into a prime (27726866143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28006441 + ... + 28007430.

It is an arithmetic number, because the mean of its divisors is an integer number (2184541008).

Almost surely, 2^27726866145 is an apocalyptic number.

It is an amenable number.

27726866145 is a deficient number, since it is larger than the sum of its proper divisors (24702118047).

27726866145 is a wasteful number, since it uses less digits than its factorization.

27726866145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56013893 (or 56013890 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 27726866145 in words is "twenty-seven billion, seven hundred twenty-six million, eight hundred sixty-six thousand, one hundred forty-five".