61403643055161 has 32 divisors (see below), whose sum is σ = 99653433753600. Its totient is φ = 37058620591440.

The previous prime is 61403643055081. The next prime is 61403643055177. The reversal of 61403643055161 is 16155034630416.

61403643055161 is a `hidden beast` number, since 6 + 1 + 4 + 0 + 3 + 6 + 4 + 30 + 551 + 61 = 666.

61403643055161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61403643055161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61403643055561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432452601 + ... + 432594566.

It is an arithmetic number, because the mean of its divisors is an integer number (3114169804800).

Almost surely, 2^{61403643055161} is an apocalyptic number.

It is an amenable number.

61403643055161 is a deficient number, since it is larger than the sum of its proper divisors (38249790698439).

61403643055161 is a wasteful number, since it uses less digits than its factorization.

61403643055161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865047426 (or 865047420 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

Adding to 61403643055161 its reverse (16155034630416), we get a palindrome (77558677685577).

The spelling of 61403643055161 in words is "sixty-one trillion, four hundred three billion, six hundred forty-three million, fifty-five thousand, one hundred sixty-one".