6111100561061 has 4 divisors (see below), whose sum is σ = 6142764294732. Its totient is φ = 6079436827392.

The previous prime is 6111100561051. The next prime is 6111100561109. The reversal of 6111100561061 is 1601650011116.

It is a happy number.

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 1021880396161 + 5089220164900 = 1010881^2 + 2255930^2 .

It is a cyclic number.

It is not a de Polignac number, because 6111100561061 - 2⁶ = 6111100560997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6111100561001) 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, 15831866546 + ... + 15831866931.

It is an arithmetic number, because the mean of its divisors is an integer number (1535691073683).

Almost surely, 2^{6111100561061} is an apocalyptic number.

It is an amenable number.

6111100561061 is a deficient number, since it is larger than the sum of its proper divisors (31663733671).

6111100561061 is a wasteful number, since it uses less digits than its factorization.

6111100561061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31663733670.

The product of its (nonzero) digits is 1080, while the sum is 29.

Adding to 6111100561061 its reverse (1601650011116), we get a palindrome (7712750572177).

The spelling of 6111100561061 in words is "six trillion, one hundred eleven billion, one hundred million, five hundred sixty-one thousand, sixty-one".