27539757649 has 4 divisors (see below), whose sum is σ = 28428136960. Its totient is φ = 26651378340.

The previous prime is 27539757611. The next prime is 27539757701. The reversal of 27539757649 is 94675793572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27539757649 - 2¹⁵ = 27539724881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27539757449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444189609 + ... + 444189670.

It is an arithmetic number, because the mean of its divisors is an integer number (7107034240).

Almost surely, 2^27539757649 is an apocalyptic number.

It is an amenable number.

27539757649 is a deficient number, since it is larger than the sum of its proper divisors (888379311).

27539757649 is an equidigital number, since it uses as much as digits as its factorization.

27539757649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888379310.

The product of its digits is 100018800, while the sum is 64.

The spelling of 27539757649 in words is "twenty-seven billion, five hundred thirty-nine million, seven hundred fifty-seven thousand, six hundred forty-nine".