2061069191989 has 2 divisors, whose sum is σ = 2061069191990. Its totient is φ = 2061069191988.

The previous prime is 2061069191941. The next prime is 2061069192011. The reversal of 2061069191989 is 9891919601602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1283439752100 + 777629439889 = 1132890^2 + 881833^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061069191989 - 2⁹ = 2061069191477 is a prime.

It is a super-2 number, since 2×2061069191989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061069101989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030534595994 + 1030534595995.

It is an arithmetic number, because the mean of its divisors is an integer number (1030534595995).

Almost surely, 2^{2061069191989} is an apocalyptic number.

It is an amenable number.

2061069191989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061069191989 is an equidigital number, since it uses as much as digits as its factorization.

2061069191989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 61.

The spelling of 2061069191989 in words is "two trillion, sixty-one billion, sixty-nine million, one hundred ninety-one thousand, nine hundred eighty-nine".