61342446889 has 2 divisors, whose sum is σ = 61342446890. Its totient is φ = 61342446888.

The previous prime is 61342446857. The next prime is 61342446899. The reversal of 61342446889 is 98864424316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44251329600 + 17091117289 = 210360^2 + 130733^2 .

It is a cyclic number.

It is not a de Polignac number, because 61342446889 - 2⁵ = 61342446857 is a prime.

It is not a weakly prime, because it can be changed into another prime (61342446839) 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, 30671223444 + 30671223445.

It is an arithmetic number, because the mean of its divisors is an integer number (30671223445).

Almost surely, 2^61342446889 is an apocalyptic number.

It is an amenable number.

61342446889 is a deficient number, since it is larger than the sum of its proper divisors (1).

61342446889 is an equidigital number, since it uses as much as digits as its factorization.

61342446889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7962624, while the sum is 55.

The spelling of 61342446889 in words is "sixty-one billion, three hundred forty-two million, four hundred forty-six thousand, eight hundred eighty-nine".