1155279669161 has 4 divisors (see below), whose sum is σ = 1155285092052. Its totient is φ = 1155274246272.

The previous prime is 1155279669151. The next prime is 1155279669163. The reversal of 1155279669161 is 1619669725511.

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 526321230400 + 628958438761 = 725480^2 + 793069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155279669161 is a prime.

It is a super-2 number, since 2×1155279669161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155279669161.

It is not an unprimeable number, because it can be changed into a prime (1155279669163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2378240 + ... + 2822513.

It is an arithmetic number, because the mean of its divisors is an integer number (288821273013).

Almost surely, 2^{1155279669161} is an apocalyptic number.

It is an amenable number.

1155279669161 is a deficient number, since it is larger than the sum of its proper divisors (5422891).

1155279669161 is an equidigital number, since it uses as much as digits as its factorization.

1155279669161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5422890.

The product of its digits is 6123600, while the sum is 59.

The spelling of 1155279669161 in words is "one trillion, one hundred fifty-five billion, two hundred seventy-nine million, six hundred sixty-nine thousand, one hundred sixty-one".