2061539261 has 2 divisors, whose sum is σ = 2061539262. Its totient is φ = 2061539260.

The previous prime is 2061539257. The next prime is 2061539267. The reversal of 2061539261 is 1629351602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2034551236 + 26988025 = 45106^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061539261 - 2² = 2061539257 is a prime.

It is a super-2 number, since 2×2061539261² = 8499888249288852242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061539267) 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, 1030769630 + 1030769631.

It is an arithmetic number, because the mean of its divisors is an integer number (1030769631).

Almost surely, 2^2061539261 is an apocalyptic number.

It is an amenable number.

2061539261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061539261 is an equidigital number, since it uses as much as digits as its factorization.

2061539261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 2061539261 is about 45404.1766911371. The cubic root of 2061539261 is about 1272.7131656431.

The spelling of 2061539261 in words is "two billion, sixty-one million, five hundred thirty-nine thousand, two hundred sixty-one".