61168496861 has 2 divisors, whose sum is σ = 61168496862. Its totient is φ = 61168496860.

The previous prime is 61168496771. The next prime is 61168496863. The reversal of 61168496861 is 16869486116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42242991961 + 18925504900 = 205531^2 + 137570^2 .

It is a cyclic number.

It is not a de Polignac number, because 61168496861 - 2²² = 61164302557 is a prime.

Together with 61168496863, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61168496797 and 61168496806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61168496863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30584248430 + 30584248431.

It is an arithmetic number, because the mean of its divisors is an integer number (30584248431).

Almost surely, 2^61168496861 is an apocalyptic number.

It is an amenable number.

61168496861 is a deficient number, since it is larger than the sum of its proper divisors (1).

61168496861 is an equidigital number, since it uses as much as digits as its factorization.

61168496861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The spelling of 61168496861 in words is "sixty-one billion, one hundred sixty-eight million, four hundred ninety-six thousand, eight hundred sixty-one".