5645422261 has 2 divisors, whose sum is σ = 5645422262. Its totient is φ = 5645422260.

The previous prime is 5645422229. The next prime is 5645422267. The reversal of 5645422261 is 1622245465.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5111535025 + 533887236 = 71495^2 + 23106^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645422261 - 2⁵ = 5645422229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5645422261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5645422267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822711130 + 2822711131.

It is an arithmetic number, because the mean of its divisors is an integer number (2822711131).

Almost surely, 2^5645422261 is an apocalyptic number.

It is an amenable number.

5645422261 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645422261 is an equidigital number, since it uses as much as digits as its factorization.

5645422261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 37.

The square root of 5645422261 is about 75136.0250545635. The cubic root of 5645422261 is about 1780.5963432383.

The spelling of 5645422261 in words is "five billion, six hundred forty-five million, four hundred twenty-two thousand, two hundred sixty-one".