64443218149 has 2 divisors, whose sum is σ = 64443218150. Its totient is φ = 64443218148.

The previous prime is 64443218101. The next prime is 64443218207. The reversal of 64443218149 is 94181234446.

64443218149 is digitally balanced in base 2, 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., 42574132225 + 21869085924 = 206335^2 + 147882^2 .

It is a cyclic number.

It is not a de Polignac number, because 64443218149 - 2²⁷ = 64309000421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64443218099 and 64443218108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64443218249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221609074 + 32221609075.

It is an arithmetic number, because the mean of its divisors is an integer number (32221609075).

Almost surely, 2^64443218149 is an apocalyptic number.

It is an amenable number.

64443218149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64443218149 is an equidigital number, since it uses as much as digits as its factorization.

64443218149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The spelling of 64443218149 in words is "sixty-four billion, four hundred forty-three million, two hundred eighteen thousand, one hundred forty-nine".