61695525649 has 2 divisors, whose sum is σ = 61695525650. Its totient is φ = 61695525648.

The previous prime is 61695525637. The next prime is 61695525691. The reversal of 61695525649 is 94652559616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54980870400 + 6714655249 = 234480^2 + 81943^2 .

It is a cyclic number.

It is not a de Polignac number, because 61695525649 - 2¹¹ = 61695523601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61695525593 and 61695525602.

It is not a weakly prime, because it can be changed into another prime (61695525049) 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, 30847762824 + 30847762825.

It is an arithmetic number, because the mean of its divisors is an integer number (30847762825).

Almost surely, 2^61695525649 is an apocalyptic number.

It is an amenable number.

61695525649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61695525649 is an equidigital number, since it uses as much as digits as its factorization.

61695525649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496000, while the sum is 58.

The spelling of 61695525649 in words is "sixty-one billion, six hundred ninety-five million, five hundred twenty-five thousand, six hundred forty-nine".