12811466643768 has 128 divisors (see below), whose sum is σ = 38604645172800. Its totient is φ = 3913215971328.

The previous prime is 12811466643763. The next prime is 12811466643821. The reversal of 12811466643768 is 86734666411821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12811466643761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16266721 + ... + 17036112.

Almost surely, 2^{12811466643768} is an apocalyptic number.

12811466643768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12811466643768 is an abundant number, since it is smaller than the sum of its proper divisors (25793178529032).

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

12811466643768 is a wasteful number, since it uses less digits than its factorization.

12811466643768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33302998 (or 33302988 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 12811466643768 in words is "twelve trillion, eight hundred eleven billion, four hundred sixty-six million, six hundred forty-three thousand, seven hundred sixty-eight".