65432161 has 2 divisors, whose sum is σ = 65432162. Its totient is φ = 65432160.

The previous prime is 65432153. The next prime is 65432173. The reversal of 65432161 is 16123456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 129600 = 8081^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 65432161 - 2³ = 65432153 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65462161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32716080 + 32716081.

It is an arithmetic number, because the mean of its divisors is an integer number (32716081).

Almost surely, 2^65432161 is an apocalyptic number.

It is an amenable number.

65432161 is a deficient number, since it is larger than the sum of its proper divisors (1).

65432161 is an equidigital number, since it uses as much as digits as its factorization.

65432161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 65432161 is about 8089.0148349475. The cubic root of 65432161 is about 402.9616856727.

The spelling of 65432161 in words is "sixty-five million, four hundred thirty-two thousand, one hundred sixty-one".