6161111055161 has 4 divisors (see below), whose sum is σ = 6161464813812. Its totient is φ = 6160757296512.

The previous prime is 6161111055089. The next prime is 6161111055167. The reversal of 6161111055161 is 1615501111616.

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 5855219099536 + 305891955625 = 2419756^2 + 553075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6161111055161 is a prime.

It is a super-3 number, since 3×6161111055161³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6161111055167) 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, 176853200 + ... + 176888033.

It is an arithmetic number, because the mean of its divisors is an integer number (1540366203453).

Almost surely, 2^{6161111055161} is an apocalyptic number.

It is an amenable number.

6161111055161 is a deficient number, since it is larger than the sum of its proper divisors (353758651).

6161111055161 is a wasteful number, since it uses less digits than its factorization.

6161111055161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353758650.

The product of its (nonzero) digits is 5400, while the sum is 35.

Adding to 6161111055161 its reverse (1615501111616), we get a palindrome (7776612166777).

The spelling of 6161111055161 in words is "six trillion, one hundred sixty-one billion, one hundred eleven million, fifty-five thousand, one hundred sixty-one".