1268091612726 has 16 divisors (see below), whose sum is σ = 2685370474224. Its totient is φ = 397832662784.

The previous prime is 1268091612721. The next prime is 1268091612737. The reversal of 1268091612726 is 6272161908621.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268091612721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6216135255 + ... + 6216135458.

It is an arithmetic number, because the mean of its divisors is an integer number (167835654639).

Almost surely, 2^{1268091612726} is an apocalyptic number.

1268091612726 is an abundant number, since it is smaller than the sum of its proper divisors (1417278861498).

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

1268091612726 is a wasteful number, since it uses less digits than its factorization.

1268091612726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12432270735.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 1268091612726 in words is "one trillion, two hundred sixty-eight billion, ninety-one million, six hundred twelve thousand, seven hundred twenty-six".