32161107809 has 2 divisors, whose sum is σ = 32161107810. Its totient is φ = 32161107808.

The previous prime is 32161107743. The next prime is 32161107827. The reversal of 32161107809 is 90870116123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20171952784 + 11989155025 = 142028^2 + 109495^2 .

It is an emirp because it is prime and its reverse (90870116123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32161107809 - 2¹⁶ = 32161042273 is a prime.

It is not a weakly prime, because it can be changed into another prime (32161107829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16080553904 + 16080553905.

It is an arithmetic number, because the mean of its divisors is an integer number (16080553905).

Almost surely, 2^32161107809 is an apocalyptic number.

It is an amenable number.

32161107809 is a deficient number, since it is larger than the sum of its proper divisors (1).

32161107809 is an equidigital number, since it uses as much as digits as its factorization.

32161107809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 32161107809 in words is "thirty-two billion, one hundred sixty-one million, one hundred seven thousand, eight hundred nine".