61430790193 has 2 divisors, whose sum is σ = 61430790194. Its totient is φ = 61430790192.

The previous prime is 61430790191. The next prime is 61430790227. The reversal of 61430790193 is 39109703416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57910978609 + 3519811584 = 240647^2 + 59328^2 .

It is a cyclic number.

It is not a de Polignac number, because 61430790193 - 2¹ = 61430790191 is a prime.

Together with 61430790191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61430790191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30715395096 + 30715395097.

It is an arithmetic number, because the mean of its divisors is an integer number (30715395097).

Almost surely, 2^61430790193 is an apocalyptic number.

It is an amenable number.

61430790193 is a deficient number, since it is larger than the sum of its proper divisors (1).

61430790193 is an equidigital number, since it uses as much as digits as its factorization.

61430790193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The spelling of 61430790193 in words is "sixty-one billion, four hundred thirty million, seven hundred ninety thousand, one hundred ninety-three".