1267140720679 has 4 divisors (see below), whose sum is σ = 1296609109576. Its totient is φ = 1237672331784.

The previous prime is 1267140720641. The next prime is 1267140720683. The reversal of 1267140720679 is 9760270417621.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1267140720679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267140720619) 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, 14734194384 + ... + 14734194469.

It is an arithmetic number, because the mean of its divisors is an integer number (324152277394).

Almost surely, 2^{1267140720679} is an apocalyptic number.

1267140720679 is a deficient number, since it is larger than the sum of its proper divisors (29468388897).

1267140720679 is an equidigital number, since it uses as much as digits as its factorization.

1267140720679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29468388896.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 1267140720679 in words is "one trillion, two hundred sixty-seven billion, one hundred forty million, seven hundred twenty thousand, six hundred seventy-nine".