61961161186 has 8 divisors (see below), whose sum is σ = 95453680860. Its totient is φ = 30143267568.

The previous prime is 61961161151. The next prime is 61961161187. The reversal of 61961161186 is 68116116916.

61961161186 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61719949225 + 241211961 = 248435^2 + 15531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (61961161187) 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, 418656421 + ... + 418656568.

Almost surely, 2^61961161186 is an apocalyptic number.

61961161186 is a deficient number, since it is larger than the sum of its proper divisors (33492519674).

61961161186 is a wasteful number, since it uses less digits than its factorization.

61961161186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837313028.

The product of its digits is 93312, while the sum is 46.

The spelling of 61961161186 in words is "sixty-one billion, nine hundred sixty-one million, one hundred sixty-one thousand, one hundred eighty-six".