1091988314467 has 4 divisors (see below), whose sum is σ = 1092622824216. Its totient is φ = 1091353804720.

The previous prime is 1091988314441. The next prime is 1091988314471. The reversal of 1091988314467 is 7644138891901.

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 1091988314467 - 2³⁵ = 1057628576099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091988314867) 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, 317252293 + ... + 317255734.

It is an arithmetic number, because the mean of its divisors is an integer number (273155706054).

Almost surely, 2^{1091988314467} is an apocalyptic number.

1091988314467 is a deficient number, since it is larger than the sum of its proper divisors (634509749).

1091988314467 is an equidigital number, since it uses as much as digits as its factorization.

1091988314467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634509748.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 1091988314467 in words is "one trillion, ninety-one billion, nine hundred eighty-eight million, three hundred fourteen thousand, four hundred sixty-seven".