12127770605 has 8 divisors (see below), whose sum is σ = 14570391192. Its totient is φ = 9690838848.

The previous prime is 12127770593. The next prime is 12127770619. The reversal of 12127770605 is 50607772121.

It can be written as a sum of positive squares in 4 ways, for example, as 2059253641 + 10068516964 = 45379^2 + 100342^2 .

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 12127770605 - 2⁶ = 12127770541 is a prime.

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, 1417514 + ... + 1426043.

It is an arithmetic number, because the mean of its divisors is an integer number (1821298899).

Almost surely, 2^12127770605 is an apocalyptic number.

It is an amenable number.

12127770605 is a deficient number, since it is larger than the sum of its proper divisors (2442620587).

12127770605 is an equidigital number, since it uses as much as digits as its factorization.

12127770605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844415.

The product of its (nonzero) digits is 41160, while the sum is 38.

The spelling of 12127770605 in words is "twelve billion, one hundred twenty-seven million, seven hundred seventy thousand, six hundred five".