27518399985 has 16 divisors (see below), whose sum is σ = 44082958464. Its totient is φ = 14658640512.

The previous prime is 27518399963. The next prime is 27518399989. The reversal of 27518399985 is 58999381572.

It is not a de Polignac number, because 27518399985 - 2¹² = 27518395889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27518399989) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1102212 + ... + 1126901.

It is an arithmetic number, because the mean of its divisors is an integer number (2755184904).

Almost surely, 2^27518399985 is an apocalyptic number.

It is an amenable number.

27518399985 is a deficient number, since it is larger than the sum of its proper divisors (16564558479).

27518399985 is a wasteful number, since it uses less digits than its factorization.

27518399985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229944.

The product of its digits is 48988800, while the sum is 66.

The spelling of 27518399985 in words is "twenty-seven billion, five hundred eighteen million, three hundred ninety-nine thousand, nine hundred eighty-five".