61310685529 has 2 divisors, whose sum is σ = 61310685530. Its totient is φ = 61310685528.

The previous prime is 61310685509. The next prime is 61310685551. The reversal of 61310685529 is 92558601316.

61310685529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51778092304 + 9532593225 = 227548^2 + 97635^2 .

It is a cyclic number.

It is not a de Polignac number, because 61310685529 - 2¹⁵ = 61310652761 is a prime.

It is not a weakly prime, because it can be changed into another prime (61310685509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30655342764 + 30655342765.

It is an arithmetic number, because the mean of its divisors is an integer number (30655342765).

Almost surely, 2^61310685529 is an apocalyptic number.

It is an amenable number.

61310685529 is a deficient number, since it is larger than the sum of its proper divisors (1).

61310685529 is an equidigital number, since it uses as much as digits as its factorization.

61310685529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 61310685529 in words is "sixty-one billion, three hundred ten million, six hundred eighty-five thousand, five hundred twenty-nine".