119775521665 has 4 divisors (see below), whose sum is σ = 143730626004. Its totient is φ = 95820417328.

The previous prime is 119775521647. The next prime is 119775521669. The reversal of 119775521665 is 566125577911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566125577911 = 17 ⋅33301504583.

It can be written as a sum of positive squares in 2 ways, for example, as 84518699841 + 35256821824 = 290721^2 + 187768^2 .

It is a cyclic number.

It is not a de Polignac number, because 119775521665 - 2¹⁷ = 119775390593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (119775521669) 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, 11977552162 + ... + 11977552171.

It is an arithmetic number, because the mean of its divisors is an integer number (35932656501).

Almost surely, 2^119775521665 is an apocalyptic number.

It is an amenable number.

119775521665 is a deficient number, since it is larger than the sum of its proper divisors (23955104339).

119775521665 is an equidigital number, since it uses as much as digits as its factorization.

119775521665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23955104338.

The product of its digits is 3969000, while the sum is 55.

The spelling of 119775521665 in words is "one hundred nineteen billion, seven hundred seventy-five million, five hundred twenty-one thousand, six hundred sixty-five".