61417648769 has 2 divisors, whose sum is σ = 61417648770. Its totient is φ = 61417648768.

The previous prime is 61417648757. The next prime is 61417648777. The reversal of 61417648769 is 96784671416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61299817744 + 117831025 = 247588^2 + 10855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61417648769 is a prime.

It is a super-2 number, since 2×61417648769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61417248769) 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, 30708824384 + 30708824385.

It is an arithmetic number, because the mean of its divisors is an integer number (30708824385).

Almost surely, 2^61417648769 is an apocalyptic number.

It is an amenable number.

61417648769 is a deficient number, since it is larger than the sum of its proper divisors (1).

61417648769 is an equidigital number, since it uses as much as digits as its factorization.

61417648769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 59.

The spelling of 61417648769 in words is "sixty-one billion, four hundred seventeen million, six hundred forty-eight thousand, seven hundred sixty-nine".