36421911665 has 4 divisors (see below), whose sum is σ = 43706294004. Its totient is φ = 29137529328.

The previous prime is 36421911653. The next prime is 36421911709. The reversal of 36421911665 is 56611912463.

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 19452159841 + 16969751824 = 139471^2 + 130268^2 .

It is a cyclic number.

It is not a de Polignac number, because 36421911665 - 2⁴ = 36421911649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3642191162 + ... + 3642191171.

It is an arithmetic number, because the mean of its divisors is an integer number (10926573501).

Almost surely, 2^36421911665 is an apocalyptic number.

It is an amenable number.

36421911665 is a deficient number, since it is larger than the sum of its proper divisors (7284382339).

36421911665 is an equidigital number, since it uses as much as digits as its factorization.

36421911665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7284382338.

The product of its digits is 233280, while the sum is 44.

The spelling of 36421911665 in words is "thirty-six billion, four hundred twenty-one million, nine hundred eleven thousand, six hundred sixty-five".