12127747628 has 6 divisors (see below), whose sum is σ = 21223558356.
Its totient is φ = 6063873812.
The previous prime is 12127747591. The next prime is 12127747663. The reversal of 12127747628 is 82674772121.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515968450 + ... + 1515968457.
It is an arithmetic number, because the mean of its divisors is an integer number (3537259726).
Almost surely, 212127747628 is an apocalyptic number.
It is an amenable number.
12127747628 is a deficient number, since it is larger than the sum of its proper divisors (9095810728).
12127747628 is a wasteful number, since it uses less digits than its factorization.
12127747628 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3031936911 (or 3031936909 counting only the distinct ones).
The product of its digits is 526848, while the sum is 47.
The spelling of 12127747628 in words is "twelve billion, one hundred twenty-seven million, seven hundred forty-seven thousand, six hundred twenty-eight".