1268445477667 has 4 divisors (see below), whose sum is σ = 1268588635776. Its totient is φ = 1268302319560.

The previous prime is 1268445477617. The next prime is 1268445477683. The reversal of 1268445477667 is 7667745448621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1268445477667 - 2¹⁵ = 1268445444899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268445477617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71565763 + ... + 71583484.

It is an arithmetic number, because the mean of its divisors is an integer number (317147158944).

Almost surely, 2^{1268445477667} is an apocalyptic number.

1268445477667 is a deficient number, since it is larger than the sum of its proper divisors (143158109).

1268445477667 is an equidigital number, since it uses as much as digits as its factorization.

1268445477667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143158108.

The product of its digits is 379330560, while the sum is 67.

The spelling of 1268445477667 in words is "one trillion, two hundred sixty-eight billion, four hundred forty-five million, four hundred seventy-seven thousand, six hundred sixty-seven".