2061617191 has 2 divisors, whose sum is σ = 2061617192. Its totient is φ = 2061617190.

The previous prime is 2061617177. The next prime is 2061617209. The reversal of 2061617191 is 1917161602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2061617191 - 2²¹ = 2059520039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061617791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030808595 + 1030808596.

It is an arithmetic number, because the mean of its divisors is an integer number (1030808596).

Almost surely, 2^2061617191 is an apocalyptic number.

2061617191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061617191 is an equidigital number, since it uses as much as digits as its factorization.

2061617191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 2061617191 is about 45405.0348639884. The cubic root of 2061617191 is about 1272.7292024122.

Adding to 2061617191 its reverse (1917161602), we get a palindrome (3978778793).

The spelling of 2061617191 in words is "two billion, sixty-one million, six hundred seventeen thousand, one hundred ninety-one".