12691284195050 has 24 divisors (see below), whose sum is σ = 23681206486956. Its totient is φ = 5060294778240.

The previous prime is 12691284195017. The next prime is 12691284195089. The reversal of 12691284195050 is 5059148219621.

It can be written as a sum of positive squares in 6 ways, for example, as 152539456969 + 12538744738081 = 390563^2 + 3541009^2 .

It is a super-2 number, since 2×12691284195050² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12691284194983 and 12691284195001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405456689 + ... + 405487988.

Almost surely, 2^{12691284195050} is an apocalyptic number.

12691284195050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12691284195050 is a deficient number, since it is larger than the sum of its proper divisors (10989922291906).

12691284195050 is a wasteful number, since it uses less digits than its factorization.

12691284195050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810945002 (or 810944997 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 12691284195050 in words is "twelve trillion, six hundred ninety-one billion, two hundred eighty-four million, one hundred ninety-five thousand, fifty".