1268391194208 has 72 divisors (see below), whose sum is σ = 3609756744048. Its totient is φ = 422472460032.

The previous prime is 1268391194207. The next prime is 1268391194209. The reversal of 1268391194208 is 8024911938621.

It is a happy number.

1268391194208 is a `hidden beast` number, since 1 + 2 + 68 + 391 + 194 + 2 + 0 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1268391194207) and next prime (1268391194209).

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268391194207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1314735 + ... + 2065262.

It is an arithmetic number, because the mean of its divisors is an integer number (50135510334).

Almost surely, 2^{1268391194208} is an apocalyptic number.

1268391194208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1268391194208 is an abundant number, since it is smaller than the sum of its proper divisors (2341365549840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268391194208 is a wasteful number, since it uses less digits than its factorization.

1268391194208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381316 (or 3381305 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 1268391194208 in words is "one trillion, two hundred sixty-eight billion, three hundred ninety-one million, one hundred ninety-four thousand, two hundred eight".