27899545645 has 16 divisors (see below), whose sum is σ = 34154421120. Its totient is φ = 21872048704.

The previous prime is 27899545607. The next prime is 27899545651. The reversal of 27899545645 is 54654599872.

It is a cyclic number.

It is not a de Polignac number, because 27899545645 - 2⁷ = 27899545517 is a prime.

It is a super-3 number, since 3×27899545645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 55657 + ... + 242686.

It is an arithmetic number, because the mean of its divisors is an integer number (2134651320).

Almost surely, 2^27899545645 is an apocalyptic number.

It is an amenable number.

27899545645 is a deficient number, since it is larger than the sum of its proper divisors (6254875475).

27899545645 is a wasteful number, since it uses less digits than its factorization.

27899545645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298724.

The product of its digits is 108864000, while the sum is 64.

The spelling of 27899545645 in words is "twenty-seven billion, eight hundred ninety-nine million, five hundred forty-five thousand, six hundred forty-five".