61107135709 has 2 divisors, whose sum is σ = 61107135710. Its totient is φ = 61107135708.

The previous prime is 61107135707. The next prime is 61107135721. The reversal of 61107135709 is 90753170116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60612962809 + 494172900 = 246197^2 + 22230^2 .

It is a cyclic number.

It is not a de Polignac number, because 61107135709 - 2¹ = 61107135707 is a prime.

Together with 61107135707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61107135707) 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, 30553567854 + 30553567855.

It is an arithmetic number, because the mean of its divisors is an integer number (30553567855).

Almost surely, 2^61107135709 is an apocalyptic number.

It is an amenable number.

61107135709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61107135709 is an equidigital number, since it uses as much as digits as its factorization.

61107135709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The spelling of 61107135709 in words is "sixty-one billion, one hundred seven million, one hundred thirty-five thousand, seven hundred nine".