61706725057 has 2 divisors, whose sum is σ = 61706725058. Its totient is φ = 61706725056.

The previous prime is 61706724997. The next prime is 61706725061. The reversal of 61706725057 is 75052760716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42336766081 + 19369958976 = 205759^2 + 139176^2 .

It is a cyclic number.

It is not a de Polignac number, because 61706725057 - 2¹⁹ = 61706200769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61706724998 and 61706725016.

It is not a weakly prime, because it can be changed into another prime (61706725097) 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, 30853362528 + 30853362529.

It is an arithmetic number, because the mean of its divisors is an integer number (30853362529).

Almost surely, 2^61706725057 is an apocalyptic number.

It is an amenable number.

61706725057 is a deficient number, since it is larger than the sum of its proper divisors (1).

61706725057 is an equidigital number, since it uses as much as digits as its factorization.

61706725057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 617400, while the sum is 46.

The spelling of 61706725057 in words is "sixty-one billion, seven hundred six million, seven hundred twenty-five thousand, fifty-seven".