1164853051865 has 4 divisors (see below), whose sum is σ = 1397823662244. Its totient is φ = 931882441488.

The previous prime is 1164853051861. The next prime is 1164853051919. The reversal of 1164853051865 is 5681503584611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 924928439824 + 239924612041 = 961732^2 + 489821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164853051865 - 2² = 1164853051861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164853051861) 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, 116485305182 + ... + 116485305191.

It is an arithmetic number, because the mean of its divisors is an integer number (349455915561).

Almost surely, 2^{1164853051865} is an apocalyptic number.

It is an amenable number.

1164853051865 is a deficient number, since it is larger than the sum of its proper divisors (232970610379).

1164853051865 is an equidigital number, since it uses as much as digits as its factorization.

1164853051865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232970610378.

The product of its (nonzero) digits is 3456000, while the sum is 53.

The spelling of 1164853051865 in words is "one trillion, one hundred sixty-four billion, eight hundred fifty-three million, fifty-one thousand, eight hundred sixty-five".