27728746507 has 8 divisors (see below), whose sum is σ = 34570904832. Its totient is φ = 21606815400.

The previous prime is 27728746469. The next prime is 27728746511. The reversal of 27728746507 is 70564782772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27728746507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27728747507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180056719 + ... + 180056872.

It is an arithmetic number, because the mean of its divisors is an integer number (4321363104).

Almost surely, 2^27728746507 is an apocalyptic number.

27728746507 is a deficient number, since it is larger than the sum of its proper divisors (6842158325).

27728746507 is a wasteful number, since it uses less digits than its factorization.

27728746507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360113609.

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 27728746507 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-six thousand, five hundred seven".