61334689489 has 2 divisors, whose sum is σ = 61334689490. Its totient is φ = 61334689488.

The previous prime is 61334689477. The next prime is 61334689511. The reversal of 61334689489 is 98498643316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47950050625 + 13384638864 = 218975^2 + 115692^2 .

It is a cyclic number.

It is not a de Polignac number, because 61334689489 - 2¹⁹ = 61334165201 is a prime.

It is a super-2 number, since 2×61334689489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61334683489) 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, 30667344744 + 30667344745.

It is an arithmetic number, because the mean of its divisors is an integer number (30667344745).

Almost surely, 2^61334689489 is an apocalyptic number.

It is an amenable number.

61334689489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61334689489 is an equidigital number, since it uses as much as digits as its factorization.

61334689489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 61.

The spelling of 61334689489 in words is "sixty-one billion, three hundred thirty-four million, six hundred eighty-nine thousand, four hundred eighty-nine".