131286777668 has 12 divisors (see below), whose sum is σ = 235094927760. Its totient is φ = 64116798312.

The previous prime is 131286777631. The next prime is 131286777673. The reversal of 131286777668 is 866777682131.

It is a self number, because there is not a number n which added to its sum of digits gives 131286777668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381647438 + ... + 381647781.

It is an arithmetic number, because the mean of its divisors is an integer number (19591243980).

Almost surely, 2^131286777668 is an apocalyptic number.

It is an amenable number.

131286777668 is a deficient number, since it is larger than the sum of its proper divisors (103808150092).

131286777668 is a wasteful number, since it uses less digits than its factorization.

131286777668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763295266 (or 763295264 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 62.

The spelling of 131286777668 in words is "one hundred thirty-one billion, two hundred eighty-six million, seven hundred seventy-seven thousand, six hundred sixty-eight".