27749560687 has 4 divisors (see below), whose sum is σ = 28706442120. Its totient is φ = 26792679256.

The previous prime is 27749560679. The next prime is 27749560711. The reversal of 27749560687 is 78606594772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27749560687 - 2³ = 27749560679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27749560637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478440673 + ... + 478440730.

It is an arithmetic number, because the mean of its divisors is an integer number (7176610530).

Almost surely, 2^27749560687 is an apocalyptic number.

27749560687 is a deficient number, since it is larger than the sum of its proper divisors (956881433).

27749560687 is an equidigital number, since it uses as much as digits as its factorization.

27749560687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956881432.

The product of its (nonzero) digits is 35562240, while the sum is 61.

The spelling of 27749560687 in words is "twenty-seven billion, seven hundred forty-nine million, five hundred sixty thousand, six hundred eighty-seven".