61793600261 has 2 divisors, whose sum is σ = 61793600262. Its totient is φ = 61793600260.

The previous prime is 61793600257. The next prime is 61793600321. The reversal of 61793600261 is 16200639716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50198402500 + 11595197761 = 224050^2 + 107681^2 .

It is a cyclic number.

It is not a de Polignac number, because 61793600261 - 2² = 61793600257 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 (61793600251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30896800130 + 30896800131.

It is an arithmetic number, because the mean of its divisors is an integer number (30896800131).

Almost surely, 2^61793600261 is an apocalyptic number.

It is an amenable number.

61793600261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61793600261 is an equidigital number, since it uses as much as digits as its factorization.

61793600261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 61793600261 in words is "sixty-one billion, seven hundred ninety-three million, six hundred thousand, two hundred sixty-one".