27909517672 has 16 divisors (see below), whose sum is σ = 52349097060. Its totient is φ = 13949758464.

The previous prime is 27909517637. The next prime is 27909517717. The reversal of 27909517672 is 27671590972.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27421372836 + 488144836 = 165594^2 + 22094^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601273 + ... + 646024.

Almost surely, 2^27909517672 is an apocalyptic number.

It is an amenable number.

27909517672 is a deficient number, since it is larger than the sum of its proper divisors (24439579388).

27909517672 is a wasteful number, since it uses less digits than its factorization.

27909517672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250100 (or 1250096 counting only the distinct ones).

The product of its (nonzero) digits is 3333960, while the sum is 55.

The spelling of 27909517672 in words is "twenty-seven billion, nine hundred nine million, five hundred seventeen thousand, six hundred seventy-two".