12620994171386 has 16 divisors (see below), whose sum is σ = 19661615588520. Its totient is φ = 6070954982400.

The previous prime is 12620994171307. The next prime is 12620994171397. The reversal of 12620994171386 is 68317149902621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9989360754025 + 2631633417361 = 3160595^2 + 1622231^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958161815 + ... + 958174986.

Almost surely, 2^{12620994171386} is an apocalyptic number.

12620994171386 is a deficient number, since it is larger than the sum of its proper divisors (7040621417134).

12620994171386 is a wasteful number, since it uses less digits than its factorization.

12620994171386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916336929.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 12620994171386 in words is "twelve trillion, six hundred twenty billion, nine hundred ninety-four million, one hundred seventy-one thousand, three hundred eighty-six".