27387728650 has 12 divisors (see below), whose sum is σ = 50941175382. Its totient is φ = 10955091440.

The previous prime is 27387728639. The next prime is 27387728651. The reversal of 27387728650 is 5682778372.

It can be written as a sum of positive squares in 3 ways, for example, as 14618502649 + 12769226001 = 120907^2 + 113001^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27387728591 and 27387728600.

It is not an unprimeable number, because it can be changed into a prime (27387728651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273877237 + ... + 273877336.

Almost surely, 2^27387728650 is an apocalyptic number.

27387728650 is a deficient number, since it is larger than the sum of its proper divisors (23553446732).

27387728650 is a wasteful number, since it uses less digits than its factorization.

27387728650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547754585 (or 547754580 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 27387728650 in words is "twenty-seven billion, three hundred eighty-seven million, seven hundred twenty-eight thousand, six hundred fifty".