1171445871867 has 4 divisors (see below), whose sum is σ = 1561927829160. Its totient is φ = 780963914576.

The previous prime is 1171445871859. The next prime is 1171445871887. The reversal of 1171445871867 is 7681785441711.

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 1171445871867 - 2³ = 1171445871859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1171445871867.

It is not an unprimeable number, because it can be changed into a prime (1171445871887) 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, 195240978642 + ... + 195240978647.

It is an arithmetic number, because the mean of its divisors is an integer number (390481957290).

Almost surely, 2^{1171445871867} is an apocalyptic number.

1171445871867 is a deficient number, since it is larger than the sum of its proper divisors (390481957293).

1171445871867 is an equidigital number, since it uses as much as digits as its factorization.

1171445871867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390481957292.

The product of its digits is 10536960, while the sum is 60.

The spelling of 1171445871867 in words is "one trillion, one hundred seventy-one billion, four hundred forty-five million, eight hundred seventy-one thousand, eight hundred sixty-seven".