27748125693 has 10 divisors (see below), whose sum is σ = 41450903934. Its totient is φ = 18498750408.

The previous prime is 27748125683. The next prime is 27748125719. The reversal of 27748125693 is 39652184772.

It is a happy number.

27748125693 is a `hidden beast` number, since 2 + 7 + 74 + 8 + 1 + 2 + 569 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13970530809 + 13777594884 = 118197^2 + 117378^2 .

It is not a de Polignac number, because 27748125693 - 2¹⁶ = 27748060157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27748125683) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 171284646 + ... + 171284807.

Almost surely, 2^27748125693 is an apocalyptic number.

It is an amenable number.

27748125693 is a deficient number, since it is larger than the sum of its proper divisors (13702778241).

27748125693 is an equidigital number, since it uses as much as digits as its factorization.

27748125693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342569465 (or 342569456 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 27748125693 in words is "twenty-seven billion, seven hundred forty-eight million, one hundred twenty-five thousand, six hundred ninety-three".