65143541549 has 2 divisors, whose sum is σ = 65143541550. Its totient is φ = 65143541548.

The previous prime is 65143541537. The next prime is 65143541563. The reversal of 65143541549 is 94514534156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64913867524 + 229674025 = 254782^2 + 15155^2 .

It is a cyclic number.

It is not a de Polignac number, because 65143541549 - 2¹² = 65143537453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65143544549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32571770774 + 32571770775.

It is an arithmetic number, because the mean of its divisors is an integer number (32571770775).

Almost surely, 2^65143541549 is an apocalyptic number.

It is an amenable number.

65143541549 is a deficient number, since it is larger than the sum of its proper divisors (1).

65143541549 is an equidigital number, since it uses as much as digits as its factorization.

65143541549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 47.

The spelling of 65143541549 in words is "sixty-five billion, one hundred forty-three million, five hundred forty-one thousand, five hundred forty-nine".