61384164461 has 2 divisors, whose sum is σ = 61384164462. Its totient is φ = 61384164460.

The previous prime is 61384164431. The next prime is 61384164497. The reversal of 61384164461 is 16446148316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44070604900 + 17313559561 = 209930^2 + 131581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61384164461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61384164431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30692082230 + 30692082231.

It is an arithmetic number, because the mean of its divisors is an integer number (30692082231).

Almost surely, 2^61384164461 is an apocalyptic number.

It is an amenable number.

61384164461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61384164461 is an equidigital number, since it uses as much as digits as its factorization.

61384164461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 44.

The spelling of 61384164461 in words is "sixty-one billion, three hundred eighty-four million, one hundred sixty-four thousand, four hundred sixty-one".