61762513217 has 2 divisors, whose sum is σ = 61762513218. Its totient is φ = 61762513216.

The previous prime is 61762513199. The next prime is 61762513271. The reversal of 61762513217 is 71231526716.

Together with next prime (61762513271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31883316481 + 29879196736 = 178559^2 + 172856^2 .

It is a cyclic number.

It is not a de Polignac number, because 61762513217 - 2⁸ = 61762512961 is a prime.

It is not a weakly prime, because it can be changed into another prime (61762513117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30881256608 + 30881256609.

It is an arithmetic number, because the mean of its divisors is an integer number (30881256609).

Almost surely, 2^61762513217 is an apocalyptic number.

It is an amenable number.

61762513217 is a deficient number, since it is larger than the sum of its proper divisors (1).

61762513217 is an equidigital number, since it uses as much as digits as its factorization.

61762513217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The spelling of 61762513217 in words is "sixty-one billion, seven hundred sixty-two million, five hundred thirteen thousand, two hundred seventeen".