6161216361 has 4 divisors (see below), whose sum is σ = 8214955152. Its totient is φ = 4107477572.

The previous prime is 6161216359. The next prime is 6161216377. The reversal of 6161216361 is 1636121616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6161216361 - 2¹ = 6161216359 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6161211361) 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, 1026869391 + ... + 1026869396.

It is an arithmetic number, because the mean of its divisors is an integer number (2053738788).

Almost surely, 2^6161216361 is an apocalyptic number.

It is an amenable number.

6161216361 is a deficient number, since it is larger than the sum of its proper divisors (2053738791).

6161216361 is a wasteful number, since it uses less digits than its factorization.

6161216361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053738790.

The product of its digits is 7776, while the sum is 33.

The square root of 6161216361 is about 78493.4160359963. The cubic root of 6161216361 is about 1833.2519403608.

Adding to 6161216361 its reverse (1636121616), we get a palindrome (7797337977).

The spelling of 6161216361 in words is "six billion, one hundred sixty-one million, two hundred sixteen thousand, three hundred sixty-one".