61738618061 has 2 divisors, whose sum is σ = 61738618062. Its totient is φ = 61738618060.

The previous prime is 61738618033. The next prime is 61738618121. The reversal of 61738618061 is 16081683716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37556502025 + 24182116036 = 193795^2 + 155506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61738618061 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61738617997 and 61738618015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61738618661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30869309030 + 30869309031.

It is an arithmetic number, because the mean of its divisors is an integer number (30869309031).

Almost surely, 2^61738618061 is an apocalyptic number.

It is an amenable number.

61738618061 is a deficient number, since it is larger than the sum of its proper divisors (1).

61738618061 is an equidigital number, since it uses as much as digits as its factorization.

61738618061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 61738618061 in words is "sixty-one billion, seven hundred thirty-eight million, six hundred eighteen thousand, sixty-one".