12770128516 has 12 divisors (see below), whose sum is σ = 22568990220. Its totient is φ = 6321845600.

The previous prime is 12770128487. The next prime is 12770128541. The reversal of 12770128516 is 61582107721.

It can be written as a sum of positive squares in 2 ways, for example, as 7807489600 + 4962638916 = 88360^2 + 70446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15804211 + ... + 15805018.

It is an arithmetic number, because the mean of its divisors is an integer number (1880749185).

Almost surely, 2^12770128516 is an apocalyptic number.

It is an amenable number.

12770128516 is a deficient number, since it is larger than the sum of its proper divisors (9798861704).

12770128516 is a wasteful number, since it uses less digits than its factorization.

12770128516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31609334 (or 31609332 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 12770128516 in words is "twelve billion, seven hundred seventy million, one hundred twenty-eight thousand, five hundred sixteen".