61101000061 has 4 divisors (see below), whose sum is σ = 61262216800. Its totient is φ = 60939783324.

The previous prime is 61101000047. The next prime is 61101000091. The reversal of 61101000061 is 16000010116.

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 61101000061 - 2¹⁵ = 61100967293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61100999999 and 61101000044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61101000001) 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, 80607801 + ... + 80608558.

It is an arithmetic number, because the mean of its divisors is an integer number (15315554200).

Almost surely, 2^61101000061 is an apocalyptic number.

It is an amenable number.

61101000061 is a deficient number, since it is larger than the sum of its proper divisors (161216739).

61101000061 is a wasteful number, since it uses less digits than its factorization.

61101000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161216738.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 61101000061 its reverse (16000010116), we get a palindrome (77101010177).

The spelling of 61101000061 in words is "sixty-one billion, one hundred one million, sixty-one", and thus it is an aban number.