27273005645 has 4 divisors (see below), whose sum is σ = 32727606780. Its totient is φ = 21818404512.

The previous prime is 27273005629. The next prime is 27273005671. The reversal of 27273005645 is 54650037272.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8206366921 + 19066638724 = 90589^2 + 138082^2 .

It is a cyclic number.

It is not a de Polignac number, because 27273005645 - 2⁴ = 27273005629 is a prime.

It is a super-3 number, since 3×27273005645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2727300560 + ... + 2727300569.

It is an arithmetic number, because the mean of its divisors is an integer number (8181901695).

Almost surely, 2^27273005645 is an apocalyptic number.

It is an amenable number.

27273005645 is a deficient number, since it is larger than the sum of its proper divisors (5454601135).

27273005645 is an equidigital number, since it uses as much as digits as its factorization.

27273005645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454601134.

The product of its (nonzero) digits is 352800, while the sum is 41.

The spelling of 27273005645 in words is "twenty-seven billion, two hundred seventy-three million, five thousand, six hundred forty-five".