61256830717 has 2 divisors, whose sum is σ = 61256830718. Its totient is φ = 61256830716.

The previous prime is 61256830697. The next prime is 61256830729. The reversal of 61256830717 is 71703865216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32325882436 + 28930948281 = 179794^2 + 170091^2 .

It is a cyclic number.

It is not a de Polignac number, because 61256830717 - 2²³ = 61248442109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61256836717) 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, 30628415358 + 30628415359.

It is an arithmetic number, because the mean of its divisors is an integer number (30628415359).

Almost surely, 2^61256830717 is an apocalyptic number.

It is an amenable number.

61256830717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61256830717 is an equidigital number, since it uses as much as digits as its factorization.

61256830717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 61256830717 in words is "sixty-one billion, two hundred fifty-six million, eight hundred thirty thousand, seven hundred seventeen".