61366571417 has 2 divisors, whose sum is σ = 61366571418. Its totient is φ = 61366571416.

The previous prime is 61366571369. The next prime is 61366571429. The reversal of 61366571417 is 71417566316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51012287881 + 10354283536 = 225859^2 + 101756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61366571417 is a prime.

It is a super-2 number, since 2×61366571417² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61366591417) 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, 30683285708 + 30683285709.

It is an arithmetic number, because the mean of its divisors is an integer number (30683285709).

Almost surely, 2^61366571417 is an apocalyptic number.

It is an amenable number.

61366571417 is a deficient number, since it is larger than the sum of its proper divisors (1).

61366571417 is an equidigital number, since it uses as much as digits as its factorization.

61366571417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 47.

The spelling of 61366571417 in words is "sixty-one billion, three hundred sixty-six million, five hundred seventy-one thousand, four hundred seventeen".