2196161635 has 4 divisors (see below), whose sum is σ = 2635393968. Its totient is φ = 1756929304.

The previous prime is 2196161623. The next prime is 2196161641. The reversal of 2196161635 is 5361616912.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2196161635 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219616159 + ... + 219616168.

It is an arithmetic number, because the mean of its divisors is an integer number (658848492).

Almost surely, 2^2196161635 is an apocalyptic number.

2196161635 is a deficient number, since it is larger than the sum of its proper divisors (439232333).

2196161635 is an equidigital number, since it uses as much as digits as its factorization.

2196161635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439232332.

The product of its digits is 58320, while the sum is 40.

The square root of 2196161635 is about 46863.2226271305. Note that the first 3 decimals coincide. The cubic root of 2196161635 is about 1299.8346209741.

The spelling of 2196161635 in words is "two billion, one hundred ninety-six million, one hundred sixty-one thousand, six hundred thirty-five".