61039339217 has 2 divisors, whose sum is σ = 61039339218. Its totient is φ = 61039339216.

The previous prime is 61039339169. The next prime is 61039339237. The reversal of 61039339217 is 71293393016.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41224835521 + 19814503696 = 203039^2 + 140764^2 .

It is a cyclic number.

It is not a de Polignac number, because 61039339217 - 2¹² = 61039335121 is a prime.

It is not a weakly prime, because it can be changed into another prime (61039339237) 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, 30519669608 + 30519669609.

It is an arithmetic number, because the mean of its divisors is an integer number (30519669609).

Almost surely, 2^61039339217 is an apocalyptic number.

It is an amenable number.

61039339217 is a deficient number, since it is larger than the sum of its proper divisors (1).

61039339217 is an equidigital number, since it uses as much as digits as its factorization.

61039339217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 44.

The spelling of 61039339217 in words is "sixty-one billion, thirty-nine million, three hundred thirty-nine thousand, two hundred seventeen".