6444870541 has 2 divisors, whose sum is σ = 6444870542. Its totient is φ = 6444870540.

The previous prime is 6444870539. The next prime is 6444870557. The reversal of 6444870541 is 1450784446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5108675625 + 1336194916 = 71475^2 + 36554^2 .

It is a cyclic number.

It is not a de Polignac number, because 6444870541 - 2¹ = 6444870539 is a prime.

Together with 6444870539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6444870241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222435270 + 3222435271.

It is an arithmetic number, because the mean of its divisors is an integer number (3222435271).

Almost surely, 2^6444870541 is an apocalyptic number.

It is an amenable number.

6444870541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444870541 is an equidigital number, since it uses as much as digits as its factorization.

6444870541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 43.

The square root of 6444870541 is about 80279.9510525511. The cubic root of 6444870541 is about 1860.9644034272.

The spelling of 6444870541 in words is "six billion, four hundred forty-four million, eight hundred seventy thousand, five hundred forty-one".