65440159 has 2 divisors, whose sum is σ = 65440160. Its totient is φ = 65440158.

The previous prime is 65440139. The next prime is 65440169. The reversal of 65440159 is 95104456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65440159 - 2⁵ = 65440127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65440139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32720079 + 32720080.

It is an arithmetic number, because the mean of its divisors is an integer number (32720080).

Almost surely, 2^65440159 is an apocalyptic number.

65440159 is a deficient number, since it is larger than the sum of its proper divisors (1).

65440159 is an equidigital number, since it uses as much as digits as its factorization.

65440159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 65440159 is about 8089.5091940117. The cubic root of 65440159 is about 402.9781034720.

The spelling of 65440159 in words is "sixty-five million, four hundred forty thousand, one hundred fifty-nine".