61730590391 has 2 divisors, whose sum is σ = 61730590392. Its totient is φ = 61730590390.

The previous prime is 61730590373. The next prime is 61730590403. The reversal of 61730590391 is 19309503716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61730590391 - 2¹⁰ = 61730589367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61730590301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30865295195 + 30865295196.

It is an arithmetic number, because the mean of its divisors is an integer number (30865295196).

Almost surely, 2^61730590391 is an apocalyptic number.

61730590391 is a deficient number, since it is larger than the sum of its proper divisors (1).

61730590391 is an equidigital number, since it uses as much as digits as its factorization.

61730590391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 44.

The spelling of 61730590391 in words is "sixty-one billion, seven hundred thirty million, five hundred ninety thousand, three hundred ninety-one".