61031340709 has 2 divisors, whose sum is σ = 61031340710. Its totient is φ = 61031340708.

The previous prime is 61031340701. The next prime is 61031340749. The reversal of 61031340709 is 90704313016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45816118209 + 15215222500 = 214047^2 + 123350^2 .

It is a cyclic number.

It is not a de Polignac number, because 61031340709 - 2³ = 61031340701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61031340701) 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, 30515670354 + 30515670355.

It is an arithmetic number, because the mean of its divisors is an integer number (30515670355).

Almost surely, 2^61031340709 is an apocalyptic number.

It is an amenable number.

61031340709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61031340709 is an equidigital number, since it uses as much as digits as its factorization.

61031340709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 61031340709 in words is "sixty-one billion, thirty-one million, three hundred forty thousand, seven hundred nine".