27940125409 has 9 divisors (see below), whose sum is σ = 32503139697. Its totient is φ = 23947676004.

The previous prime is 27940125401. The next prime is 27940125427. The reversal of 27940125409 is 90452104972.

The square root of 27940125409 is 167153.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 27940125409 - 2³ = 27940125401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27940125401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1158132 + ... + 1182010.

Almost surely, 2^27940125409 is an apocalyptic number.

27940125409 is the 167153-rd square number.

27940125409 is the 83577-th centered octagonal number.

It is an amenable number.

27940125409 is a deficient number, since it is larger than the sum of its proper divisors (4563014288).

27940125409 is an frugal number, since it uses more digits than its factorization.

27940125409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47772 (or 23886 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 27940125409 in words is "twenty-seven billion, nine hundred forty million, one hundred twenty-five thousand, four hundred nine".