1280067952867 has 4 divisors (see below), whose sum is σ = 1396437766776. Its totient is φ = 1163698138960.

The previous prime is 1280067952789. The next prime is 1280067952871. The reversal of 1280067952867 is 7682597600821.

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-1280067952867 is a prime.

It is a super-2 number, since 2×1280067952867² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280067952897) 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, 58184906938 + ... + 58184906959.

It is an arithmetic number, because the mean of its divisors is an integer number (349109441694).

Almost surely, 2^{1280067952867} is an apocalyptic number.

1280067952867 is a deficient number, since it is larger than the sum of its proper divisors (116369813909).

1280067952867 is a wasteful number, since it uses less digits than its factorization.

1280067952867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116369813908.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 1280067952867 in words is "one trillion, two hundred eighty billion, sixty-seven million, nine hundred fifty-two thousand, eight hundred sixty-seven".