27699346639 has 4 divisors (see below), whose sum is σ = 28049971360. Its totient is φ = 27348721920.

The previous prime is 27699346603. The next prime is 27699346643. The reversal of 27699346639 is 93664399672.

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 27699346639 - 2¹⁹ = 27698822351 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 (27699346439) 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 3 ways as a sum of consecutive naturals, for example, 175312242 + ... + 175312399.

It is an arithmetic number, because the mean of its divisors is an integer number (7012492840).

Almost surely, 2^27699346639 is an apocalyptic number.

27699346639 is a deficient number, since it is larger than the sum of its proper divisors (350624721).

27699346639 is an equidigital number, since it uses as much as digits as its factorization.

27699346639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350624720.

The product of its digits is 79361856, while the sum is 64.

The spelling of 27699346639 in words is "twenty-seven billion, six hundred ninety-nine million, three hundred forty-six thousand, six hundred thirty-nine".