61197260689 has 2 divisors, whose sum is σ = 61197260690. Its totient is φ = 61197260688.

The previous prime is 61197260681. The next prime is 61197260711. The reversal of 61197260689 is 98606279116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57968748289 + 3228512400 = 240767^2 + 56820^2 .

It is a cyclic number.

It is not a de Polignac number, because 61197260689 - 2³ = 61197260681 is a prime.

It is not a weakly prime, because it can be changed into another prime (61197260681) 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, 30598630344 + 30598630345.

It is an arithmetic number, because the mean of its divisors is an integer number (30598630345).

Almost surely, 2^61197260689 is an apocalyptic number.

It is an amenable number.

61197260689 is a deficient number, since it is larger than the sum of its proper divisors (1).

61197260689 is an equidigital number, since it uses as much as digits as its factorization.

61197260689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 61197260689 in words is "sixty-one billion, one hundred ninety-seven million, two hundred sixty thousand, six hundred eighty-nine".