5645539261 has 2 divisors, whose sum is σ = 5645539262. Its totient is φ = 5645539260.

The previous prime is 5645539253. The next prime is 5645539337. The reversal of 5645539261 is 1629355465.

5645539261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4708567161 + 936972100 = 68619^2 + 30610^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645539261 - 2³ = 5645539253 is a prime.

It is a super-2 number, since 2×5645539261² = 63744227094984852242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5645599261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822769630 + 2822769631.

It is an arithmetic number, because the mean of its divisors is an integer number (2822769631).

Almost surely, 2^5645539261 is an apocalyptic number.

It is an amenable number.

5645539261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645539261 is an equidigital number, since it uses as much as digits as its factorization.

5645539261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 46.

The square root of 5645539261 is about 75136.8036384301. The cubic root of 5645539261 is about 1780.6086439617.

The spelling of 5645539261 in words is "five billion, six hundred forty-five million, five hundred thirty-nine thousand, two hundred sixty-one".