12777391108 has 24 divisors (see below), whose sum is σ = 22863161664. Its totient is φ = 6246314400.

The previous prime is 12777391087. The next prime is 12777391127. The reversal of 12777391108 is 80119377721.

It is a super-3 number, since 3×12777391108³ (a number of 31 digits) contains 333 as substring.

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, 116038 + ... + 197533.

It is an arithmetic number, because the mean of its divisors is an integer number (952631736).

Almost surely, 2^12777391108 is an apocalyptic number.

It is an amenable number.

12777391108 is a deficient number, since it is larger than the sum of its proper divisors (10085770556).

12777391108 is a wasteful number, since it uses less digits than its factorization.

12777391108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313803 (or 313801 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 46.

The spelling of 12777391108 in words is "twelve billion, seven hundred seventy-seven million, three hundred ninety-one thousand, one hundred eight".