27750012605 has 8 divisors (see below), whose sum is σ = 38057160192. Its totient is φ = 19028580048.

The previous prime is 27750012571. The next prime is 27750012643. The reversal of 27750012605 is 50621005772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27750012605 - 2³⁴ = 10570143421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 792857503 = 27750012605 / (2 + 7 + 7 + 5 + 0 + 0 + 1 + 2 + 6 + 0 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396428717 + ... + 396428786.

It is an arithmetic number, because the mean of its divisors is an integer number (4757145024).

Almost surely, 2^27750012605 is an apocalyptic number.

It is an amenable number.

27750012605 is a deficient number, since it is larger than the sum of its proper divisors (10307147587).

27750012605 is an equidigital number, since it uses as much as digits as its factorization.

27750012605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792857515.

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 27750012605 in words is "twenty-seven billion, seven hundred fifty million, twelve thousand, six hundred five".